Finite sum involving signless Stirling numbers of the first kind and the Bell numbers. Appears in the process of normal ordering of n-th power of (a)^3*(a+*a), where a+ and a are boson creation and annihilation operators, respectively.
A121630
Finite sum involving signless Stirling numbers of the first kind and the Bell numbers. Appears in the process of normal ordering of n-th power of (a)^3*(a+*a), where a+ and a are boson creation and annihilation operators, respectively.
Terms
- a(0) =1a(1) =4a(2) =29a(3) =302a(4) =4089a(5) =68056a(6) =1342949a(7) =30635074a(8) =792915057a(9) =22952573484a(10) =734630159341
External references
- oeis: A121630