G.f.: exp( Sum_{n>=1} A132303(n)/3 * x^n/n ), where A132303(n) = sum of the cubes of the trinomial coefficients in row n of triangle A027907.
A251686
G.f.: exp( Sum_{n>=1} A132303(n)/3 * x^n/n ), where A132303(n) = sum of the cubes of the trinomial coefficients in row n of triangle A027907.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =100a(4) =1556a(5) =27260a(6) =515510a(7) =10284094a(8) =213433728a(9) =4566363088a(10) =100082133066
External references
- oeis: A251686