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%I #5 Jun 13 2017 22:50:30
%S 1,9,117,1881,36051,805875,20661609,599319747,19443585048,
%T 698723462022,27583235473854,1187660855613822,55430739480692085,
%U 2789074498460404927,150571050665946174760,8684625004973955639293,533144024633105768180154
%N Column 4 of triangle A113340, also equals column 0 of A113340^9.
%o (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[n+5,5]
%Y Cf. A113341 (column 1), A113342 (column 2), A113343 (column 3), A113340.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Nov 08 2005
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