G.f.: A(x) = exp( Sum_{n>=1} A005261(n)*x^n/n ) where A005261(n) = Sum_{k=0..n} C(n,k)^5.
A218117
G.f.: A(x) = exp( Sum_{n>=1} A005261(n)*x^n/n ) where A005261(n) = Sum_{k=0..n} C(n,k)^5.
Terms
- a(0) =1a(1) =2a(2) =19a(3) =198a(4) =2961a(5) =49566a(6) =938322a(7) =19083624a(8) =412160478a(9) =9305822076a(10) =217855152321
External references
- oeis: A218117