Binomial transform of A090426.

Terms

a(0) =1a(1) =3a(2) =13a(3) =59a(4) =257a(5) =1088a(6) =4547a(7) =18906a(8) =78448a(9) =325210a(10) =1347552a(11) =5582415a(12) =23122986a(13) =95771842a(14) =396659584a(15) =1642825239a(16) =6803957409a(17) =28179306468a(18) =116707377067a(19) =483354745392