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A136732
Column 2 of square array A136730.
2
1, 3, 9, 43, 324, 3510, 50528, 913377, 19918602, 509040779, 14918466255, 493115508126, 18143982947900, 735340631600946, 32542320101428755, 1561227609244084205, 80700623119099359600, 4470904603875492038790
OFFSET
0,2
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 19 2008
STATUS
approved