A111468 Leading diagonal of A111467.

1, 3, 14, 56, 280, 1872, 11760, 104832, 1224720, 12545280, 96526080, 1163289600, 13891046400, 200222668800, 2917119744000, 47259168768000, 738275586048000, 13386781384704000, 259936372452556800, 5427242941317120000

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Crossrefs

Cf. A111467, A111469.

Sequence in context: A026527 A037786 A037667 * A052412 A353095 A037793

Adjacent sequences: A111465 A111466 A111467 * A111469 A111470 A111471

Keyword

easy,nonn

Author

Amarnath Murthy, Aug 05 2005

Extensions

More terms from David Wasserman, Feb 10 2009

Status

approved