G.f. A(x) satisfies A(x) = 1 / (1 - x*A(x) / (1+x))^3.
A371495
G.f. A(x) satisfies A(x) = 1 / (1 - x*A(x) / (1+x))^3.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =64a(4) =381a(5) =2430a(6) =16227a(7) =112008a(8) =792717a(9) =5721165a(10) =41945373a(11) =311529831a(12) =2338909219a(13) =17722127580a(14) =135346614906
External references
- oeis: A371495