Expansion of e.g.f.: (1+x)/(1-x*exp(x)).
A138909
Expansion of e.g.f.: (1+x)/(1-x*exp(x)).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =33a(4) =232a(5) =2045a(6) =21636a(7) =267043a(8) =3766848a(9) =59776137a(10) =1053986500a(11) =20442543671a(12) =432537117552
External references
- oeis: A138909