p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - 2 S - S^2 + S^3.

Terms

a(0) =2a(1) =5a(2) =13a(3) =35a(4) =91a(5) =241a(6) =631a(7) =1662a(8) =4362a(9) =11470a(10) =30127a(11) =79179a(12) =208023a(13) =546633a(14) =1436257a(15) =3773939a(16) =9916134a(17) =26055432a(18) =68461966a(19) =179888381a(20) =472667065a(21) =1241962303a(22) =3263330095a(23) =8574599917a(24) =22530279167a(25) =59199680826a(26) =155550750026a(27) =408719050346