The sixth Euler transform of the sequence with g.f. 1+x.

Terms

a(0) =1a(1) =1a(2) =6a(3) =21a(4) =91a(5) =336a(6) =1337a(7) =5026a(8) =19193a(9) =71769a(10) =268272a(11) =992676a(12) =3659116a(13) =13400426a(14) =48863017a(15) =177299790a(16) =640713627a(17) =2305930966a(18) =8268556438a(19) =29544196129a(20) =105215495691a(21) =373523546056