[seqfan] Re: A144406.

[Charles Greathouse]

Please make the change! Rescuing important sequences which don't explain
themselves (or their significance) is one of the most important tasks
anyone can do for the OEIS.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University


On Fri, Jul 18, 2014 at 1:39 AM, L. Edson Jeffery <lejeffery2 at gmail.com>
wrote:

> A144406 has definition:
>
> "Polynomial expansion as anti-diagonal of:
> p(x,n)=(x-1)/(x^n*(-x+(2*x-1)/x^n). Based on the Pisot general polynomial
> type q(x,n)=x^n-(x^n-1)/(x-1)."
>
> This sequence remains unedited, and I understand why. However, it is an
> important sequence, with its significance perhaps not known to the authors.
> I propose that at least the definition be changed to (something like):
>
> "Rectangular array read by upward antidiagonals in which entry T(n,k) in
> row n and column k gives the number of compositions of k in which no part
> exceeds n, n>=1, k>=0."
>
> I use this array frequently but have never found any use for the triangular
> version defined by the authors.
>
> The current definition could be moved to the formula section (actually I
> think it is essentially already there).
>
> Ed Jeffery
>
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