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 A306910 #5 Mar 17 2019 21:14:21 %S A306910 1,1,1,0,1,1,2,2,0,1,1,2,5,3,6,6,1,1,2,5,7,10,14,20,12,25,25,2,5,7,15, %T A306910 19,30,37,59,74,71,101,62,125,127,15,25,36,49,89,116,160,214,241,343, %U A306910 476,449,427,615,385,763,776,103,151,209,319,415,594,818,1068,1234,1725 %N A306910 Expansion of Sum_{k>=0} x^(k^2) * Product_{j=1..k} (1 + j*x^j). %t A306910 nmax = 67; CoefficientList[Series[Sum[x^(k^2) Product[(1 + j x^j), {j, 1, k}], {k, 0, nmax}], {x, 0, nmax}], x] %Y A306910 Cf. A306707, A306734, A318770. %K A306910 nonn %O A306910 0,7 %A A306910 _Ilya Gutkovskiy_, Mar 16 2019