A115087 Column 1 of triangle A115085.

1, 2, 5, 21, 102, 579, 3601, 24426, 176858, 1359906, 10996740, 93136545, 821734072, 7529402477, 71404315785, 699210393923, 7053151126260, 73158494370744, 778922147312076, 8500606925203992, 94961268583354364, 1084632255967292304

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Crossrefs

Cf. A115085, A115086 (column 0), A115088 (column 2), A115089 (row sums); A115082.

Sequence in context: A270597 A174080 A337283 * A008981 A008982 A185134

Adjacent sequences: A115084 A115085 A115086 * A115088 A115089 A115090

Keyword

nonn

Author

Paul D. Hanna, Jan 13 2006

Status

approved