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Search: id:A113391
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| 1, 9, 153, 3621, 110637, 4176549, 188802141, 9981491997, 605817292893, 41590997891929, 3190816992548889, 270817573670371995, 25214094974302894695, 2556615042094813435491, 280570514270855698070535
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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^9)[n+1, 1]}
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CROSSREFS
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Cf. A113389, A113378 (column 0), A113390 (column 1), A113370.
Sequence in context: A012017 A130980 A133309 this_sequence A045755 A113137 A009037
Adjacent sequences: A113388 A113389 A113390 this_sequence A113392 A113393 A113394
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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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