Expansion of e.g.f.: exp( 2*(exp(x)-1)/(2-exp(x)) ).
A123881
Expansion of e.g.f.: exp( 2*(exp(x)-1)/(2-exp(x)) ).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =70a(4) =626a(5) =6774a(6) =85714a(7) =1238710a(8) =20096146a(9) =361205046a(10) =7118099922a(11) =152499926198
External references
- oeis: A123881