E.g.f.: exp(2x/(1-2x)).

A104533

E.g.f.: exp(2x/(1-2x)).

Terms

    a(0) =1a(1) =2a(2) =12a(3) =104a(4) =1168a(5) =16032a(6) =259264a(7) =4817024a(8) =100954368a(9) =2353435136a(10) =60355677184

External references