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A124567
Main diagonal of table A124560.
1
1, 1, 3, 22, 317, 7581, 272914, 13975298, 981599065, 92344174075, 11474433841581, 1869937363283342, 398202456366104555, 110561615797436467938, 39978343388337757968279, 18814183279605303823720601
OFFSET
0,3
CROSSREFS
Cf. A124560; A124557 (variant).
Sequence in context: A305963 A366204 A261280 * A161967 A192036 A229770
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 07 2006
STATUS
approved