Expansion of e.g.f. x*(1+x-3*x^2)/(1-3*x).
A052690
Expansion of e.g.f. x*(1+x-3*x^2)/(1-3*x).
Terms
- a(0) =0a(1) =1a(2) =8a(3) =54a(4) =648a(5) =9720a(6) =174960a(7) =3674160a(8) =88179840a(9) =2380855680a(10) =71425670400
External references
- oeis: A052690