A107721 Column 1 of triangle A107719.

1, 2, 13, 131, 1741, 28451, 549757, 12247211, 308953453, 8706012827, 271093643293, 9245857326635, 342832527086797, 13733511532751099, 591127774090746493, 27209560375187822795, 1333804962202136755501

Offset: 0

Author

Paul D. Hanna, May 30 2005

Keywords

• nonn

Crossrefs

Cf. A107717, A107719.

Programs

PARI