A112740 Row sums of number triangle A112739.

1, 2, 4, 7, 13, 26, 58, 147, 423, 1366, 4880, 19039, 80281, 362914, 1747598, 8918299, 48024291, 271891710, 1613325844, 10005690695, 64702147429, 435311589418, 3041246276098, 22024930755299, 165082467634303, 1278742554953574

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Formula

a(n)=sum{k=0..n, sum{j=0..k, (2-0^j)*(n-1)^(k-j)}}.

Crossrefs

Sequence in context: A023431 A025246 A256942 * A309050 A265580 A136408

Adjacent sequences: A112737 A112738 A112739 * A112741 A112742 A112743

Keyword

easy,nonn

Author

Paul Barry, Sep 16 2005

Status

approved