G.f. satisfies A(x) = 1 + x * A(x) * (1 + A(x))^2.
A371655
G.f. satisfies A(x) = 1 + x * A(x) * (1 + A(x))^2.
Terms
- a(0) =1a(1) =4a(2) =32a(3) =336a(4) =4032a(5) =52352a(6) =716032a(7) =10161408a(8) =148229120a(9) =2208921600a(10) =33482670080a(11) =514630230016
External references
- oeis: A371655