A125795 - OEIS

A125795

Column 5 of table A125790; also equals row sums of matrix power A078121^5.

1, 6, 36, 286, 3396, 64350, 2026564, 109082974, 10243585092, 1704787839326, 509106367263812, 275575947307878750, 272638898948894782532, 496470192421055920965982, 1674003944602430578138969156, 10505662319550964196499807897950, 123269344114733507237294056110191684

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OFFSET

0,2

COMMENTS

Triangle A078121 shifts left one column under matrix square and is related to partitions into powers of 2.

LINKS

Table of n, a(n) for n=0..16.

PROG

(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]))

CROSSREFS

Cf. A125790, A078121; columns: A002577, A125792, A125793, A125794, A125796; diagonals: A125797, A125798.

Sequence in context: A330449 A346547 A134008 * A138418 A064239 A047898

Adjacent sequences: A125792 A125793 A125794 * A125796 A125797 A125798

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 10 2006

STATUS

approved