p-INVERT of the positive Fibonacci numbers (A000045), where p(S) = 1 - S - S^2.

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =80a(5) =237a(6) =701a(7) =2073a(8) =6129a(9) =18120a(10) =53569a(11) =158367a(12) =468181a(13) =1384083a(14) =4091760a(15) =12096453a(16) =35760689a(17) =105719157a(18) =312537041a(19) =923951760a(20) =2731474161a(21) =8075043963a(22) =23872213729a(23) =70573310907a(24) =208635540400a(25) =616788246957