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 A113105 #3 Mar 30 2012 18:36:51
%S A113105 1,2,33,2704,1082905,2156566656,21543117605345,1081795451307347456,
%T A113105 273019500242348456497329,346065491936438505902218920448,
%U A113105 2201645604139293737199292995777020545
%N A113105 Diagonal of square table A113103; also, a(n) equals the n-th term in column 0 of the matrix (n+1)-th power of triangle A113106.
%o A113105 (PARI) {a(n,q=5)=local(M=matrix(n+1,n+1));for(r=1,n+1, for(c=1,r, M[r,c]=if(r==c,1,if(c>1,(M^q)[r-1,c-1])+(M^q)[r-1,c]))); return(if(n<1,0,(M^n)[n,1]))}
%Y A113105 Cf. A113103, A113106.
%K A113105 nonn
%O A113105 0,2
%A A113105 _Paul D. Hanna_, Oct 14 2005