G.f. satisfies A(x) = 1 + x^3*A(x)^5 / (1 - x*A(x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =6a(7) =12a(8) =19a(9) =62a(10) =156a(11) =318a(12) =852a(13) =2254a(14) =5262a(15) =13441a(16) =35543a(17) =88772a(18) =226880a(19) =596937a(20) =1539188a(21) =3980364a(22) =10468270a(23) =27410289a(24) =71702956a(25) =189169352a(26) =499529048a(27) =1318355542a(28) =3493861461a(29) =9278408639