Binomial transform of A169609.

Terms

a(0) =1a(1) =4a(2) =10a(3) =20a(4) =38a(5) =74a(6) =148a(7) =298a(8) =598a(9) =1196a(10) =2390a(11) =4778a(12) =9556a(13) =19114a(14) =38230a(15) =76460a(16) =152918a(17) =305834a(18) =611668a(19) =1223338a(20) =2446678a(21) =4893356a(22) =9786710a(23) =19573418a(24) =39146836a(25) =78293674a(26) =156587350a(27) =313174700a(28) =626349398a(29) =1252698794