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 A066816 #14 Nov 14 2018 08:13:29
%S A066816 1,1,1,2,3,4,6,8,10,15,20,25,36,46,58,78,95,120,160,198,249,318,392,
%T A066816 485,608,745,914,1140,1390,1692,2092,2528,3032,3709,4468,5364,6494,
%U A066816 7770,9279,11161,13347,15824,18920,22465,26539,31607,37345,43994,52016
%N A066816 Expansion of Product_{k>=1} (1 + A001055(k)*x^k).
%C A066816 This sequence is obtained from the generalized Euler transform in A266964 by taking f(n) = -1, g(n) = -A001055(n). - _Seiichi Manyama_, Nov 14 2018
%H A066816 Seiichi Manyama, <a href="/A066816/b066816.txt">Table of n, a(n) for n = 0..10000</a>
%F A066816 a(n) = (1/n)*Sum_{k=1..n} a(n-k)*b(k), n > 0, a(0)=1, b(k) = Sum_{d|k} (-1)^(k/d+1)*d*(A001055(d))^(k/d).
%Y A066816 Cf. A001055, A066739, A066806.
%K A066816 nonn
%O A066816 0,4
%A A066816 _Vladeta Jovovic_, Jan 20 2002