a(n) = exp(-1/2) * Sum_{k>=0} (2*k + n)^n / (2^k * k!).
A337012
a(n) = exp(-1/2) * Sum_{k>=0} (2*k + n)^n / (2^k * k!).
Terms
- a(0) =1a(1) =2a(2) =11a(3) =92a(4) =1025a(5) =14232a(6) =236403a(7) =4568720a(8) =100670529a(9) =2490511776a(10) =68341981051
External references
- oeis: A337012