[seqfan] Re: Primes embedded
Robert G. Wilson v
rgwv at rgwv.com
Thu May 6 22:23:14 CEST 2010
Zak,
As a definition, how about:
Least composite number, n, such that a prime, p, is a proper sub word of n.
Bob.
--------------------------------------------------
From: "zak seidov" <zakseidov at yahoo.com>
Sent: Thursday, May 06, 2010 12:32 PM
To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
Subject: [seqfan] Re: Primes embedded
> As to give more aruments to Marc (and me):
>
> %N A177247 Fibonacci numbers Fib(n) whose decimal expression does not
> contain any digit 6.
>
>
> --- On Thu, 5/6/10, Marc LeBrun <mlb at well.com> wrote:
>
>> From: Marc LeBrun <mlb at well.com>
>> Subject: [seqfan] Re: Primes embedded
>> To: "Sequence Fanatics Discussion list" <seqfan at list.seqfan.eu>
>> Date: Thursday, May 6, 2010, 11:40 AM
>> > a(n) > a(n-1) and a(n) is the
>> smallest available composite
>> > embedding the smallest not yet embedded prime:
>> >
>> >
>> S=12,30,35,57,110,130,170,190,230,290,310,370,410,430,447,453,...
>> > p= 2 3 5 7 11 13
>> 17 19 23 29 31 37
>> 41 43 47 53 ...
>> >
>> > Could please someone compute a hundred terms or so,
>> rephrase
>> > my definition in good English, coauthor and submit (if
>> of
>> > interest)?
>>
>> Seqfans, please, can we show a little more common sense and
>> restraint?
>>
>> Forgive me if I've not yet drunk enough coffee this morning
>> to attain a
>> sufficiently indulgent frame of mind, and I don't mean to
>> pick on anyone
>> personally, but these kinds of submissions are alarmingly
>> on the increase.
>>
>> I feel compelled to suggest they seem to be the epitome of
>> "uninteresting".
>>
>> I've always supported a highly permissive filter for OEIS
>> submissions. But
>> merely playing with strings of decimal digits is decidedly
>> NOT interesting.
>>
>> Nor does alluding to the "primes" contribute any interest
>> whatsoever, since
>> it might equally as well have been Fibonacci numbers,
>> powers of 69, Seqfan's
>> IP addresses, or any other arbitrarily chosen digit-pattern
>> match.
>>
>> The OEIS is intended to be an encyclopedia of INTEGER
>> sequences, not an
>> encyclopedia of peculiar [1] TEXT fragments subject to
>> geeky gematria [2].
>>
>> Spewing these kinds of sequences really feels like a very
>> unkind imposition
>> on everyone's time and attention (especially Neil's
>> (especially now)). This
>> is exacerbated by requesting others do the work of
>> composition, description
>> and submission.
>>
>> Worst of all, such sequences permanently dilute, if not
>> pollute, the value
>> of the OEIS, making it harder for users to get meaningful
>> results from
>> queries, and harder for programs to compute truly
>> interesting relationships.
>>
>> It's like flooding the Louvre with zillions of sketchy
>> kindergarten finger
>> paintings. There's enough room so that submissions
>> need not be anything
>> near masterpieces, but surely better impulse control could
>> be exercised?
>>
>> Respectfully yours,
>> --MLB
>>
>> ========
>> Notes:
>>
>> [1] Consider: interpreting the elements of OEIS sequences
>> straightforwardly
>> as integers is lucid. But precisely specifying them
>> as text reveals such an
>> alternative definition would be ludicrous. Those
>> truly interested in the
>> "Online Encyclopedia of <Finite Non-empty Strings
>> Comprised of Either Just
>> the Single Character 'Zero', or a Single Non-zero Digit
>> Character Followed
>> by Any Number of Digit Characters, Including None>
>> Sequences" are of course
>> free to create and maintain "the
>> OE<FNSCEJSCZSNDCFANDCIN>S". But this isn't
>> the charter of the OEIS.
>>
>> [2] "Gematria... a system of assigning numerical value to a
>> word or phrase,
>> in the belief that words or phrases with identical
>> numerical values bear
>> some relation to each other, or bear some relation to the
>> number itself..."
>> --Wikipedia
>>
>>
>>
>>
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>>
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>>
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