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)^4*(a+*a), where a+ and a are boson creation and annihilation operators, respectively.
A121631
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)^4*(a+*a), where a+ and a are boson creation and annihilation operators, respectively.
Terms
- a(0) =1a(1) =5a(2) =46a(3) =613a(4) =10679a(5) =229576a(6) =5868715a(7) =173833661a(8) =5853205468a(9) =220767370219
External references
- oeis: A121631