A337039 - cp's OEIS frontend

A337039 a(n) = exp(-1/3) * Sum_{k>=0} (3k - 1)^n / (3^k k!).

n	a(n)
0	1
1	0
2	3
3	9
4	54
5	351
6	2673
7	22842
8	216513
9	2248965
10	25351704
11	307699965
12	3995419365
13	55207193328
14	808078734999
15	12480510487509
16	202697232446070
17	3451417004044323
18	61450890989472837
19	1141331486235356178
20	22066085726516137149
21	443236553318792110113
22	9233934519951699602400

[1, 0, 3, 9, 54, 351, 2673, 22842, 216513, 2248965, 25351704, 307699965, 3995419365, 55207193328, 808078734999, 12480510487509, 202697232446070, 3451417004044323, 61450890989472837, 1141331486235356178, 22066085726516137149, 443236553318792110113, 9233934519951699602400]

cp's OEIS Frontend

A337039 a(n) = exp(-1/3) * Sum_{k>=0} (3k - 1)^n / (3^k k!).

Table of values

List of values

cp's OEIS Frontend

A337039 a(n) = exp(-1/3) * Sum_{k>=0} (3*k - 1)^n / (3^k * k!).

Table of values

List of values

A337039 a(n) = exp(-1/3) * Sum_{k>=0} (3k - 1)^n / (3^k k!).