Expansion of e.g.f.: 2*exp(2*x) / (3 - exp(2*x)).
A123227
Expansion of e.g.f.: 2*exp(2*x) / (3 - exp(2*x)).
Terms
- a(0) =1a(1) =3a(2) =12a(3) =66a(4) =480a(5) =4368a(6) =47712a(7) =608016a(8) =8855040a(9) =145083648a(10) =2641216512a(11) =52891055616
External references
- oeis: A123227