p-INVERT of A175676 (starting at n=3), where p(S) = 1 - S - S^2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =16a(5) =31a(6) =64a(7) =134a(8) =274a(9) =567a(10) =1168a(11) =2405a(12) =4967a(13) =10232a(14) =21094a(15) =43505a(16) =89672a(17) =184892a(18) =381203a(19) =785886a(20) =1620327a(21) =3340606a(22) =6887304a(23) =14199737a(24) =29275538a(25) =60357622a(26) =124439898a(27) =256558196a(28) =528948160a(29) =1090536002