a(n) = exp(-1/2) * Sum_{k>=0} (2*k + 3)^n / (2^k * k!).
A337010
a(n) = exp(-1/2) * Sum_{k>=0} (2*k + 3)^n / (2^k * k!).
Terms
- a(0) =1a(1) =4a(2) =18a(3) =92a(4) =532a(5) =3440a(6) =24552a(7) =191280a(8) =1612304a(9) =14597952a(10) =141123872a(11) =1449324992a(12) =15743376704a(13) =180203389696
External references
- oeis: A337010