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Search: id:A125795
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| 1, 6, 36, 286, 3396, 64350, 2026564, 109082974, 10243585092, 1704787839326, 509106367263812, 275575947307878750, 272638898948894782532, 496470192421055920965982, 1674003944602430578138969156
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OFFSET
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0,2
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COMMENT
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Triangle A078121 shifts left one column under matrix square and is related to partitions into powers of 2.
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PROGRAM
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(PARI) {a(n)=local(p=5, q=2, A=Mat(1), B); for(m=1, n+1, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i|j==1, B[i, j]=1, B[i, j]=(A^q)[i-1, j-1]); )); A=B); return(sum(c=0, n, (A^p)[n+1, c+1]))}
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CROSSREFS
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Cf. A125790, A078121; columns: A002577, A125792, A125793, A125794, A125796; diagonals: A125797, A125798.
Adjacent sequences: A125792 A125793 A125794 this_sequence A125796 A125797 A125798
Sequence in context: A129063 A090015 A134008 this_sequence A138418 A064239 A047898
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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), Dec 10 2006
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