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Search: id:A101481
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| A101481 |
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Column 0 of triangular matrix A101479, in which row n equals row (n-1) of T^(n-1) followed by '1'. |
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+0
2
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| 1, 1, 1, 3, 19, 191, 2646, 46737, 1003150, 25330125, 735180292, 24103027865, 880627477269, 35469795883964, 1561107221731851, 74528004538789830, 3835467005270307663, 211648845813188932595, 12465477924609075602136
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OFFSET
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0,4
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PROGRAM
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(PARI) {a(n)=local(A=Mat(1), B); for(m=1, n+1, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, B[i, j]=(A^(i-2))[i-1, j]); )); A=B); return(A[n+1, 1])}
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CROSSREFS
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Adjacent sequences: A101478 A101479 A101480 this_sequence A101482 A101483 A101484
Sequence in context: A052888 A090354 A119394 this_sequence A001517 A080893 A028854
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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), Jan 21 2005
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