A121631 - cp's OEIS frontend

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.

n	a(n)
0	1
1	5
2	46
3	613
4	10679
5	229576
6	5868715
7	173833661
8	5853205468
9	220767370219
10	9219128625851
11	422221005543250
12	21041188313139901
13	1133454896301865073
14	65627299232007207934
15	4064319309355535125201
16	268077821490093243979235

[1, 5, 46, 613, 10679, 229576, 5868715, 173833661, 5853205468, 220767370219, 9219128625851, 422221005543250, 21041188313139901, 1133454896301865073, 65627299232007207934, 4064319309355535125201, 268077821490093243979235]

cp's OEIS Frontend

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.

Table of values

List of values

cp's OEIS Frontend

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.

Table of values

List of values

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.