Binomial transform of Cullen numbers A002064.

Terms

a(0) =1a(1) =4a(2) =16a(3) =62a(4) =232a(5) =842a(6) =2980a(7) =10334a(8) =35248a(9) =118610a(10) =394684a(11) =1301126a(12) =4255624a(13) =13825658a(14) =44657428a(15) =143521838a(16) =459230560a(17) =1463719586a(18) =4649308012a(19) =14722502870a(20) =46491507256a(21) =146447041994a(22) =460259735236