Search: id:A113390
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%I A113390
%S A113390 1,6,66,1091,24891,737061,27110418,1199197442,62240034172,3718021355407,
%T A113390 251730371459590,19076604651022143,1601423150451641820,
%U A113390 147628858305489901288,14834881996161804192069
%N A113390 Column 1 of triangle A113389, also equals column 0 of A113370^6.
%F A113390 Column k of A113389 = column 0 of A113370^(3*k+3) for k>=0.
%o A113390 (PARI) {a(n)=local(A,B);A=Mat(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^(3*j-2))[i-j+1,
               1]));));A=B);(A^6)[n+1,1]}
%Y A113390 Cf. A113389, A113378 (column 0), A113391 (column 2), A113370.
%Y A113390 Sequence in context: A008548 A090358 A112942 this_sequence A122020 A126459 
               A054969
%Y A113390 Adjacent sequences: A113387 A113388 A113389 this_sequence A113391 A113392 
               A113393
%K A113390 nonn
%O A113390 0,2
%A A113390 Paul D. Hanna (pauldhanna(AT)juno.com), Nov 14 2005

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