G.f. satisfies A(x) = Product_{n>=0} (1 + (x*A(x)^3)^(3^n)).
A391525
G.f. satisfies A(x) = Product_{n>=0} (1 + (x*A(x)^3)^(3^n)).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =68a(5) =393a(6) =2406a(7) =15298a(8) =99993a(9) =667759a(10) =4536791a(11) =31261365a(12) =217958132a(13) =1534798230a(14) =10899808305a(15) =77978987997a(16) =561466298011
External references
- oeis: A391525