A124567 Main diagonal of table A124560.

1, 1, 3, 22, 317, 7581, 272914, 13975298, 981599065, 92344174075, 11474433841581, 1869937363283342, 398202456366104555, 110561615797436467938, 39978343388337757968279, 18814183279605303823720601

Offset

0,3

Links

Table of n, a(n) for n=0..15.

Crossrefs

Cf. A124560; A124557 (variant).

Sequence in context: A305963 A366204 A261280 * A161967 A192036 A229770

Adjacent sequences: A124564 A124565 A124566 * A124568 A124569 A124570

Keyword

nonn

Author

Paul D. Hanna, Nov 07 2006

Status

approved