Expansion of g.f. x*(1 +82*x +366*x^2 -189*x^3)/((1+3*x)*(1+9*x)*(1-21*x)).
A120756
Expansion of g.f. x*(1 +82*x +366*x^2 -189*x^3)/((1+3*x)*(1+9*x)*(1-21*x)).
Terms
- a(0) =1a(1) =91a(2) =1410a(3) =33543a(4) =670734a(5) =14383251a(6) =299383290a(7) =6310987263a(8) =132315428934
External references
- oeis: A120756