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Search: id:A113341
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| 1, 3, 12, 69, 560, 6059, 83215, 1399161, 28020221, 654110586, 17494347067, 528556017365, 17830841841940, 665126088764191, 27208111182653865, 1211942062741823574, 58424831462907214924, 3031993693950136247986
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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+2, 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+2, 2]}
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CROSSREFS
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Cf. A113342 (column 2), A113343 (column 3), A113344 (column 4), A113340, A113360 (=A113340^3).
Adjacent sequences: A113338 A113339 A113340 this_sequence A113342 A113343 A113344
Sequence in context: A058115 A101313 A102078 this_sequence A125862 A077460 A001205
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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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