G.f. satisfies A(x) = 1 + x*A(x)*(1 + x^2*A(x)^5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =8a(5) =29a(6) =91a(7) =289a(8) =1009a(9) =3706a(10) =13606a(11) =49822a(12) =184726a(13) =696052a(14) =2648746a(15) =10132072a(16) =38952970a(17) =150635860a(18) =585724594a(19) =2287631614a(20) =8968247626a(21) =35281363830a(22) =139256375922a(23) =551306272137