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 A102317 #9 Jul 19 2024 19:05:30
%S A102317 1,2,7,40,333,3706,52128,891700,18038217,422455778,11265993155,
%T A102317 337573337108,11241696796572,412291622024088,16524941775629068,
%U A102317 719072894898300540,33777207106037303457,1704222469853179505170,91954474204022335742037,5285317768791730330402208
%N A102317 Row sums of triangle A102316.
%o A102317 (PARI) {a(n)=local(M=matrix(n+1,n+1));for(m=0,n, for(k=0,m, M[m+1,k+1]=if(m==0||k==0,1,M[m+1,k]+(k+1)*M[m,k+1]))); return(sum(i=0,n,M[n+1,i+1]))}
%Y A102317 Cf. A102316.
%K A102317 nonn
%O A102317 0,2
%A A102317 _Paul D. Hanna_, Jan 04 2005
%E A102317 More terms from _Robert C. Lyons_, Jul 19 2024