G.f.: exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^3 * x^k]^2 * x^n/n ).
A196559
G.f.: exp( Sum_{n>=1} [Sum_{k=0..n} C(n,k)^3 * x^k]^2 * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =65a(5) =384a(6) =2197a(7) =14078a(8) =94739a(9) =670612a(10) =4899280a(11) =36645899a(12) =281037158a(13) =2197679518a(14) =17489660228a(15) =141241307806
External references
- oeis: A196559