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Search: id:A113344
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| 1, 9, 117, 1881, 36051, 805875, 20661609, 599319747, 19443585048, 698723462022, 27583235473854, 1187660855613822, 55430739480692085, 2789074498460404927, 150571050665946174760, 8684625004973955639293, 533144024633105768180154
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OFFSET
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0,2
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PROGRAM
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(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]}
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CROSSREFS
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Cf. A113341 (column 1), A113342 (column 2), A113343 (column 3), A113340.
Sequence in context: A062994 A059967 A027396 this_sequence A081629 A051617 A166823
Adjacent sequences: A113341 A113342 A113343 this_sequence A113345 A113346 A113347
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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 08 2005
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