p-INVERT of the positive integers, where p(S) = 1 - S - S^3.

Terms

a(0) =1a(1) =3a(2) =9a(3) =29a(4) =95a(5) =307a(6) =976a(7) =3073a(8) =9645a(9) =30283a(10) =95207a(11) =299625a(12) =943363a(13) =2970320a(14) =9351621a(15) =29439359a(16) =92671625a(17) =291715157a(18) =918275995a(19) =2890621063a(20) =9099375792a(21) =28643956245a(22) =90168412937a(23) =283841284899a(24) =893503898503