Inverse binomial transform of A138909.

Terms

a(0) =1a(1) =1a(2) =3a(3) =20a(4) =129a(5) =1164a(6) =12265a(7) =151458a(8) =2136337a(9) =33901640a(10) =597761361a(11) =11593851510a(12) =245310524041