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 A209197 #8 Oct 21 2024 17:28:46
%S A209197 1,4,32,487,11113,335745,12607257,565877928,29553415078,1760584360722,
%T A209197 117828762999498,8752769915058447,714626485356930711,
%U A209197 63609663369881873031,6130647517448380412727,636052622643842997577302,70679525819378610579659532,8375262433274665594692923984
%N A209197 Column 1 of triangle A209196.
%C A209197 G.f. of A209196 is exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n^2, n*k) * y^k ).
%o A209197 (PARI) {a(n)=polcoeff(polcoeff(exp(sum(m=1,n,x^m/m*sum(j=0,m,binomial(m^2,m*j)*y^j))+x*O(x^n)),n,x),1,y)}
%o A209197 for(n=1,20,print1(a(n),", "))
%K A209197 nonn
%O A209197 1,2
%A A209197 _Paul D. Hanna_, Mar 05 2012