E.g.f.: Sum_{n>=0} 1/n! * Product_{k=1..n} ((1+x)^k - 1).
A207649
E.g.f.: Sum_{n>=0} 1/n! * Product_{k=1..n} ((1+x)^k - 1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =9a(4) =60a(5) =580a(6) =7380a(7) =119700a(8) =2387280a(9) =57211056a(10) =1615703040a(11) =52950688560
External references
- oeis: A207649