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

Terms

a(0) =1a(1) =3a(2) =10a(3) =34a(4) =115a(5) =387a(6) =1300a(7) =4366a(8) =14665a(9) =49263a(10) =165490a(11) =555934a(12) =1867555a(13) =6273687a(14) =21075220a(15) =70798066a(16) =237832225a(17) =798950763a(18) =2683918570a(19) =9016098634a(20) =30287816995a(21) =101745987387a(22) =341795711140