G.f. A(x) satisfies A(x) = 1 + x*(1 + x)^3*A(x)^4.
A366272
G.f. A(x) satisfies A(x) = 1 + x*(1 + x)^3*A(x)^4.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =49a(4) =399a(5) =3521a(6) =32767a(7) =316673a(8) =3147775a(9) =31977985a(10) =330544639a(11) =3465369601a(12) =36759599103a(13) =393820102657
External references
- oeis: A366272