Inverse binomial of A003949.

Terms

a(0) =1a(1) =6a(2) =29a(3) =146a(4) =729a(5) =3646a(6) =18229a(7) =91146a(8) =455729a(9) =2278646a(10) =11393229a(11) =56966146a(12) =284830729a(13) =1424153646a(14) =7120768229a(15) =35603841146a(16) =178019205729a(17) =890096028646