Expansion of g/(1 + x^3*g^2), where g = 1+x*g^3 is the g.f. of A001764.

A387678

Expansion of g/(1 + x^3*g^2), where g = 1+x*g^3 is the g.f. of A001764.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =52a(5) =261a(6) =1374a(7) =7484a(8) =41860a(9) =239052a(10) =1388145a(11) =8171799a(12) =48658094a(13) =292541013a(14) =1773431121a(15) =10828258536a(16) =66531920611a(17) =411062356077

External references