Binomial transform of A090039.

Terms

a(0) =1a(1) =3a(2) =11a(3) =42a(4) =161a(5) =611a(6) =2298a(7) =8596a(8) =32062a(9) =119413a(10) =444416a(11) =1653314a(12) =6149281a(13) =22868510a(14) =85039306a(15) =316215941a(16) =1175812311a(17) =4372067762a(18) =16256716467a(19) =60447335192a(20) =224760809887a(21) =835725230965