a(n) = Jacobsthal(n) * Fibonacci(n+1).

Terms

a(0) =0a(1) =1a(2) =2a(3) =9a(4) =25a(5) =88a(6) =273a(7) =903a(8) =2890a(9) =9405a(10) =30349a(11) =98352a(12) =318045a(13) =1029587a(14) =3331210a(15) =10781001a(16) =34886465a(17) =112897544a(18) =365339961a(19) =1182271695a(20) =3825900650a(21) =12380892261a(22) =40065380357a(23) =129654340704a(24) =419570185125