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 A113364 #6 Jun 13 2017 23:21:22 %S A113364 1,27,648,16245,442890,13269069,437085705,15779515035,621549547326, %T A113364 26584365342579,1228849871633643,61116983784901476, %U A113364 3257058909552139683,185287271910574343301,11212875913429712533737,719555515466643129103760 %N A113364 Column 4 of triangle A113360, also equals column 1 of A113360^3. %C A113364 A113360 equals the matrix cube of triangle A113340, where column 4 of A113340^3 = column 1 of A113340^9. %o A113364 (PARI) a(n)=local(A,B); A=matrix(1,1);A[1,1]=1;for(m=2,n+5,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^3)[n+5,5] %Y A113364 Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113361 (column 1), A113362 (column 2), A113363 (column 3). %K A113364 nonn %O A113364 0,2 %A A113364 _Paul D. Hanna_, Nov 09 2005