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

Terms

a(0) =0a(1) =0a(2) =3a(3) =0a(4) =9a(5) =6a(6) =18a(7) =36a(8) =40a(9) =126a(10) =135a(11) =351a(12) =513a(13) =936a(14) =1755a(15) =2682a(16) =5373a(17) =8260a(18) =15525a(19) =25731a(20) =44511a(21) =78030a(22) =129564a(23) =229617a(24) =381438a(25) =664038a(26) =1121144a(27) =1910790a(28) =3263796a(29) =5500110