G.f.: Sum_{n>=0} (3*n)!/2^n * x^n / Product_{k=1..n} (1 + k^3*x).
A216967
G.f.: Sum_{n>=0} (3*n)!/2^n * x^n / Product_{k=1..n} (1 + k^3*x).
Terms
- a(0) =1a(1) =3a(2) =177a(3) =43743a(4) =28317777a(5) =37918359903
External references
- oeis: A216967
A216967
G.f.: Sum_{n>=0} (3*n)!/2^n * x^n / Product_{k=1..n} (1 + k^3*x).