[seqfan] A106804
Harvey P. Dale
hpd1 at nyu.edu
Tue Dec 13 23:32:42 CET 2011
There seem to be several problems with the above sequence:
1. The definition does not generate the terms of the sequence, but a
different generating function does. The g.f. that works is:
(-2 x + 9 x^2 + 4 x^3)/(-1 + 10 x - 25 x^2 + x^4)
2. The Mma program that is given does not generate the terms of the
sequence.
3. There is a fairly simple linear recurrence that does generate the
terms of the sequence:
a(0)=0, a(1)=2, a(2)=11, a(3)=56,
a(n)=10*a(n-1)-25*a(n-2)+0*a(n-3)+a(n-4)
4. The Extension field says that the sequence was "Edited by the
Associate Editors of the OEIS, Apr 09 2009" which puzzles me given the
above problems.
I am not sure of how best to proceed.
Best,
Harvey
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