p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - 2*S^2.

Terms

a(0) =1a(1) =3a(2) =6a(3) =17a(4) =37a(5) =96a(6) =221a(7) =551a(8) =1302a(9) =3189a(10) =7625a(11) =18528a(12) =44537a(13) =107835a(14) =259830a(15) =628105a(16) =1515053a(17) =3659808a(18) =8832085a(19) =21328159a(20) =51481638a(21) =124302381a(22) =300068689a(23) =724468416a(24) =1748959153a(25) =4222461747a(26) =10193761254a(27) =24610180673a(28) =59413804789a(29) =143438304480