a(n) = exp(1) * Sum_{k>=0} (-1)^k*k^(2*n+1)/k!.
A308647
a(n) = exp(1) * Sum_{k>=0} (-1)^k*k^(2*n+1)/k!.
Terms
- a(0) =-1a(1) =1a(2) =-2a(3) =-9a(4) =267a(5) =-2180a(6) =-50533a(7) =1966797a(8) =8638718a(9) =-2540956509a(10) =27172288399
External references
- oeis: A308647