# [seqfan] Re: Digit of a(n) is the difference of two digits of a(n)

franktaw at netscape.net franktaw at netscape.net
Sun Dec 8 01:20:56 CET 2013

```I'm not objecting to this sequence, but it seems to me that it doesn't
really capture the spirit of the original idea - all we're getting is
differences involving zero.

Suppose we instead require only that every digit except the largest
must be the difference of two digits? (There remains the question of
how to handle having the largest digit present more than once.) This
trivially includes all single-digit numbers, but it also includes
things like 12, 24, 1235, etc.

-----Original Message-----
From: Maximilian Hasler <maximilian at hasler.fr>

and then the smallest pandigital one would be 123456789....
PS: I submitted Eric's sequence as https://oeis.org/draft/A233345

On Sat, Dec 7, 2013 at 7:44 PM,  <franktaw at netscape.net> wrote:
> If numbers have infinitely many zeros on the left, every number has
this
> property.
>
>
>
> -----Original Message-----
> From: Marc LeBrun <mlb at well.com>
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Sent: Sat, Dec 7, 2013 5:25 pm
> Subject: [seqfan] Re: Digit of a(n) is the difference of two digits
of a(n)
>
>
> Heh, or 1123456789, if you believe numbers have infinitely many
unwritten
> 0's on the left.  --MLB
>
>> ="Eric Angelini" <Eric.Angelini at kntv.be>
>
>
>> Yes, that´s it, Maximilian!
>> Best,
>> É.
>>
>>
>>> Le 7 déc. 2013 à 23:22, "M. F. Hasler" <seqfan at hasler.fr> a écrit :
>>>
>>> If I understood well, an equivalent characterization is :
>>>
>>> Numbers that have at least one digit "0" and at least two identical
>>> digits (which may be two 0's).
>>>
>>> So the least pandigital in this list is 10023456789.
>>>
>>> Maximilian
>>>
>>>> On Sat, Dec 7, 2013 at 2:42 PM, Eric Angelini
>
> <Eric.Angelini at kntv.be> wrote:
>>>>
>>>>
>>>>
>
S=100,101,110,200,202,220,300,303,330,400,404,440,500,505,550,600,606,660

> ,70
>>>>
>>>>
>
0,707,770,800,808,880,900,909,990,1000,1001,1002,1003,1004,1005,1006,1007

> ,10
>>>>
>>>>
>
08,1009,1010,1011,1012,1013,1014,1015,1016,1017,1018,1019,1020,1021,1022,

> 103
>>>>
>>>> 0,1031,...
>>>>
>>>> Hello SeqFans,
>>>> take any digit d of a(n): d is the difference between two digits of
>
> a(n).
>>>>
>>>>
>>>> What is the smallest pandigital a(n) with this property?
>>>> Best,
>>>> É.
>>>> Catapulté de mon aPhone
>>>>
>>>> _______________________________________________
>>>>
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>>>
>>>
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>>>
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>>
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