G.f.: exp( Sum_{n>=1} (x^n/n)*[Sum_{k=0..[n/2]} A034807(n,k)^n] ), where A034807 is a triangle of Lucas polynomials.
A171186
G.f.: exp( Sum_{n>=1} (x^n/n)*[Sum_{k=0..[n/2]} A034807(n,k)^n] ), where A034807 is a triangle of Lucas polynomials.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =82a(5) =1350a(6) =97888a(7) =15395388a(8) =3754569984
External references
- oeis: A171186