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 A306732 #5 Mar 06 2019 20:16:24
%S A306732 1,1,1,1,1,2,3,1,2,5,4,7,8,5,7,11,15,22,17,31,39,20,31,39,64,81,85,
%T A306732 125,97,170,211,121,167,229,265,385,531,548,573,814,686,1150,1339,860,
%U A306732 1131,1344,1888,2109,2780,3656,4127,4294,4498,6320,5568,8747,10260,6856,8673,10580
%N A306732 Expansion of Sum_{k>=0} x^(k*(k+1)/2) * Product_{j=1..k} (1 + j*x^j).
%t A306732 nmax = 59; CoefficientList[Series[Sum[x^(k (k + 1)/2) Product[(1 + j x^j), {j, 1, k}], {k, 0, nmax}], {x, 0, nmax}], x]
%Y A306732 Cf. A053261, A204856, A306704.
%K A306732 nonn
%O A306732 0,6
%A A306732 _Ilya Gutkovskiy_, Mar 06 2019