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 A113353 #5 Jun 13 2017 22:51:31 %S A113353 1,8,92,1324,23010,471724,11198006,303137822,9239501237,313689623136, %T A113353 11755195387720,482435619984340,21537360479898341,1039758627381190676, %U A113353 54002918637393187687,3003770445258147527669,178205904321326719715551 %N A113353 Column 3 of triangle A113350, also equals column 0 of A113340^8. %o A113353 (PARI) a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+1,B=matrix(m,m); for(i=1,m, for(j=1,i,if(i<3 || j==i || j>m-1,B[i,j]=1,if(j==1, B[i,1]=1,B[i,j]=(A^(2*j-1))[i-j+1,1]));));A=B);(A^8)[n+1,1] %Y A113353 Cf. A113340, A113350, A113346 (column 0), A113351 (column 1), A113352 (column 2), A113354 (column 4). %K A113353 nonn %O A113353 0,2 %A A113353 _Paul D. Hanna_, Nov 08 2005