[seqfan] Re: 2,5,8,11,23, then what?

Vladimir Shevelev shevelev at bgu.ac.il
Sat Dec 12 15:28:18 CET 2015


Dear Neil and Seqfans,

Peter Moses extended this sequence and solved
my problem finding GF.
It seems he also found that the sequence splits into
3 simpler sequences. I submitted his results
to A264613.

Best regards,
Vladimir

________________________________________
From: SeqFan [seqfan-bounces at list.seqfan.eu] on behalf of Neil Sloane [njasloane at gmail.com]
Sent: 15 November 2015 18:44
To: Sequence Fanatics Discussion list
Subject: [seqfan] 2,5,8,11,23, then what?

Dear Seqfans,
In this paper on page 31 there is a sequence 2 5 8 11 23 ... which needs
more terms:

Vladimir Shevelev, On the Basis Polynomials in the Theory of Permutations
with Prescribed Up-Down Structure, arXiv|math.CO/0801.0072.

It appears that this is not yet in the OEIS. Maybe someone could extend it?

There is also an irregular triangle of coefficients in the Appendix, which
(correcting an obvious error) I have made into https://oeis.org/A263848.
This needs checking and could use more terms.

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