G.f.: exp( Sum_{k>=1} (3*k)! / (3 * k!^3) * x^k/k ).
A370289
G.f.: exp( Sum_{k>=1} (3*k)! / (3 * k!^3) * x^k/k ).
Terms
- a(0) =1a(1) =2a(2) =17a(3) =218a(4) =3404a(5) =59644a(6) =1127009a(7) =22459358a(8) =465607137a(9) =9951077822a(10) =217885806069
External references
- oeis: A370289