Column 1 of triangle A135902.

Terms

a(0) =1a(1) =2a(2) =8a(3) =47a(4) =356a(5) =3252a(6) =34448a(7) =412546a(8) =5488222a(9) =80066096a(10) =1268400628a(11) =21651578958a(12) =395749634342