[seqfan] Re: A019298 and interesting identity.

L. Edson Jeffery lejeffery2 at gmail.com
Wed Sep 13 06:08:20 CEST 2017

Hello David Seal,

Very nice analysis and beautiful drawings.

Thank you for the quick response.

Ed Jeffery

P.s.: It looks like the g.f. for row n of that array A is

(Sum_{j=0..n-1} (n - j)*(-1)^Floor((j + 1)/2)*Binomial(Floor((n - j)/2) +
j, j)*x^j)/(Sum_{k=0..n-1}] (-1)^Floor((k + 1)/2)*Binomial(Floor((n + k -
1)/2), k)*x^k).

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