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Search: id:A113390
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| 1, 6, 66, 1091, 24891, 737061, 27110418, 1199197442, 62240034172, 3718021355407, 251730371459590, 19076604651022143, 1601423150451641820, 147628858305489901288, 14834881996161804192069
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OFFSET
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0,2
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FORMULA
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Column k of A113389 = column 0 of A113370^(3*k+3) for k>=0.
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PROGRAM
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(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]}
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CROSSREFS
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Cf. A113389, A113378 (column 0), A113391 (column 2), A113370.
Adjacent sequences: A113387 A113388 A113389 this_sequence A113391 A113392 A113393
Sequence in context: A008548 A090358 A112942 this_sequence A122020 A126459 A054969
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Nov 14 2005
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