p-INVERT of the nonnegative integers (A000027), where p(S) = 1 - S - S^2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =12a(5) =28a(6) =64a(7) =145a(8) =328a(9) =743a(10) =1686a(11) =3830a(12) =8704a(13) =19781a(14) =44950a(15) =102133a(16) =232048a(17) =527208a(18) =1197808a(19) =2721421a(20) =6183108a(21) =14048151a(22) =31917714a(23) =72517738a(24) =164761792a(25) =374342057a(26) =850512458a(27) =1932380869a(28) =4390407092a(29) =9975090996