cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A320236 G.f.: Product_{k>=1, j>=1} 1/(1 - x^(k*j))^2.

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%I A320236 #7 Oct 08 2018 10:09:00
%S A320236 1,2,7,16,41,86,193,384,787,1504,2899,5338,9852,17586,31330,54490,
%T A320236 94350,160370,271171,451776,748460,1225106,1993860,3212378,5146851,
%U A320236 8175114,12915747,20252564,31595134,48964310,75515995,115777684,176696336,268231986,405436258
%N A320236 G.f.: Product_{k>=1, j>=1} 1/(1 - x^(k*j))^2.
%C A320236 Self-convolution of A006171.
%H A320236 Vaclav Kotesovec, <a href="/A320236/b320236.txt">Table of n, a(n) for n = 0..10000</a>
%F A320236 Conjecture: log(a(n)) ~ Pi * sqrt(2*n*log(n)/3).
%t A320236 nmax = 50; CoefficientList[Series[Product[1/(1-x^(k*j))^2, {k, 1, nmax}, {j, 1, Floor[nmax/k] + 1}], {x, 0, nmax}], x]
%Y A320236 Cf. A006171, A004101, A320235.
%K A320236 nonn
%O A320236 0,2
%A A320236 _Vaclav Kotesovec_, Oct 08 2018