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.
%I A266945 #7 Dec 13 2023 08:37:29
%S A266945 1,6,30,122,450,1518,4830,14586,42330,118622,322974,857298,2226586,
%T A266945 5672046,14205654,35040722,85269114,204971478,487307542,1146995154,
%U A266945 2675265522,6188176838,14205568950,32383725450,73352114450,165171276822,369904716750,824244212554
%N A266945 Expansion of Product_{k>=1} 1 / (1 - 2*x^k)^3.
%H A266945 Vaclav Kotesovec, <a href="/A266945/b266945.txt">Table of n, a(n) for n = 0..1000</a>
%F A266945 a(n) ~ c * n^2 * 2^n, where c = 1/(2*A048651^3) = 1/(2*QPochhammer(1/2)^3) = 20.760229307499152409838537... .
%t A266945 nmax = 40; CoefficientList[Series[Product[1/(1-2*x^k)^3, {k, 1, nmax}], {x, 0, nmax}], x]
%Y A266945 Cf. A070933, A266943.
%K A266945 nonn
%O A266945 0,2
%A A266945 _Vaclav Kotesovec_, Jan 06 2016