G.f.: exp( Sum_{n>=1} A168591(n)*x^n/n ), where A168591(n) = sum of the n-th power of the trinomial coefficients in row n of triangle A027907.
A168590
G.f.: exp( Sum_{n>=1} A168591(n)*x^n/n ), where A168591(n) = sum of the n-th power of the trinomial coefficients in row n of triangle A027907.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =310a(4) =71399a(5) =153056789
External references
- oeis: A168590