G.f. A(x) satisfies A(x) = (1 + x*A(x)/(1 - x*A(x))^2)^2.
A365133
G.f. A(x) satisfies A(x) = (1 + x*A(x)/(1 - x*A(x))^2)^2.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =48a(4) =284a(5) =1792a(6) =11816a(7) =80446a(8) =561186a(9) =3990398a(10) =28815594a(11) =210746538a(12) =1557834174a(13) =11620294376a(14) =87357498949a(15) =661194915408
External references
- oeis: A365133