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Search: id:A125796
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| 1, 7, 49, 455, 6321, 140231, 5174449, 326603719, 35994670257, 7036275790791, 2470183452677297, 1573137497080468423, 1832597507832323118257, 3932481446278522861786055, 15637033863127787477309461681
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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=6, 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, A125795; diagonals: A125797, A125798.
Sequence in context: A090016 A005924 A145358 this_sequence A135745 A080895 A047899
Adjacent sequences: A125793 A125794 A125795 this_sequence A125797 A125798 A125799
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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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