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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =8a(6) =29a(7) =85a(8) =217a(9) =541a(10) =1471a(11) =4447a(12) =13975a(13) =43103a(14) =129083a(15) =382535a(16) =1147956a(17) =3519462a(18) =10947483a(19) =34162483a(20) =106341406a(21) =330590764a(22) =1030528133a(23) =3229411337a(24) =10170424724a(25) =32127163822a(26) =101633409379a(27) =321862281571