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Search: id:A113343
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| 1, 7, 70, 889, 13853, 258146, 5633264, 141487178, 4031806898, 128792484219, 4565493788191, 178051324792642, 7583098790779316, 350435514388561567, 17474323210108996497, 935597107908721785211, 53553176933223851350863
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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+4, 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+4, 4]}
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CROSSREFS
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Cf. A113341 (column 1), A113342 (column 2), A113344 (column 4), A113340.
Sequence in context: A097184 A002296 A027394 this_sequence A124566 A141151 A001669
Adjacent sequences: A113340 A113341 A113342 this_sequence A113344 A113345 A113346
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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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