A125788 A diagonal of table A125781: a(n) = A125781(n,n+1).
1, 3, 14, 91, 739, 8200, 103545, 1454823, 22446667, 434412701, 8858524146, 190620224636, 4325312221672, 103324196180719, 2949714706867857, 86423553562234994, 2610476419197591903, 81455201815035815833
Offset: 0