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Search: id:A134524
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| A134524 |
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Column 1 of triangle T=A134523, also equals column 0 of the matrix power T^3, where column k of T = column 0 of matrix power T^{(k+1)(k+2)/2} for k>=0. |
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+0
4
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| 1, 3, 12, 75, 744, 11181, 242835, 7330930, 297801232, 15839503630, 1077837497949, 92001213821228, 9684980747377593, 1239048275916503276, 190191205778008667316, 34634317805556075695994
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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^(j*(j+1)/2))[i-j+1, 1])); )); A=B); A[n+2, 2]}
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CROSSREFS
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Cf. A134523 (triangle); other columns: A134525, A134526.
Sequence in context: A104028 A074510 A168366 this_sequence A120591 A032114 A060946
Adjacent sequences: A134521 A134522 A134523 this_sequence A134525 A134526 A134527
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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 15 2007
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