[seqfan] Re: Re 2 seqs with diffs distinct
zak seidov
zakseidov at yahoo.com
Mon Apr 12 19:30:15 CEST 2010
Dear Neil,
as you rightly wrote in your first message in this thread:
"There are many solutions.One might try looking for
the earliest A in lexicographic order.
Or,alternatively,look for the earliest {A union B},which is probably better."
Only one example of "many solutions":
let's start with "seed" A & B:
A={0,1,2,3,4,5,6,7}; B={0,15},
then we (may) get
A={0,1,2,3,4,5,6,7,31,66,105,148,195,258,260,323,404,424,...},
B={0,15,48,85,126,172,220,287,297,372,459,497,...}.
Many other versions may be obtained even with the same seed A,B.
Anyway I think that a more detailed description should be given
how the particular seqs A & B were obtained
(even if it can be seen from checking the given program).
All the best,
Zak
----- Original Message ----
From: N. J. A. Sloane <njas at research.att.com>
To: seqfan at seqfan.eu
Cc: heinz at hs-heilbronn.de; njas at research.att.com; rkg at cpsc.ucalgary.ca; wouter.meeussen at pandora.be; wouter.meeussen at vandemoortele.com; zakseidov at yahoo.com
Sent: Sun, April 11, 2010 9:22:13 PM
Subject: Re 2 seqs with diffs distinct
Dear Seq Fans
On March 27 I posed a question to the list, and several
people responded. The two sequences will be visible - in a few minutes -
as A169677 and A169678.
Thanks to everone who replied.
Now that the sequences exist in the OEIS, we can ask: what
are their properties? (Rate of growth, relationship to
other sequences, e.g. Ulam-type sequences, see Index to OEIS,
etc.) The graphs are surprisingly irregular.
Zak, I believe you did a version using only primes?
Will you please submit it now?
Neil
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