Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} (-1)^n * x^n * (A(x) + x^(4*n-1))^(n+1).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =13a(7) =21a(8) =35a(9) =64a(10) =125a(11) =243a(12) =459a(13) =852a(14) =1593a(15) =3035a(16) =5857a(17) =11326a(18) =21835a(19) =42053a(20) =81246a(21) =157741a(22) =307421a(23) =600207a(24) =1172805a(25) =2294197a(26) =4495735a(27) =8827574a(28) =17363422a(29) =34198201