A359739 - cp's OEIS frontend

A359739 a(n) = Sum_{j=0..n, j even} binomial(n, j) * oddfactorial(j/2) * n^j, where oddfactorial(n) = (2n)! / (2^nn!).

n	a(n)
0	1
1	1
2	5
3	28
4	865
5	9626
6	758701
7	12606280
8	1872570113
9	41351249980
10	9925656304501
11	273345587759696
12	96567039881462305
13	3185756105692821688
14	1555524449985942662045
15	59790093545794928817376
16	38565845285812075675023361
17	1692346747225524397926264080
18	1393672439437011815394433559653

[1, 1, 5, 28, 865, 9626, 758701, 12606280, 1872570113, 41351249980, 9925656304501, 273345587759696, 96567039881462305, 3185756105692821688, 1555524449985942662045, 59790093545794928817376, 38565845285812075675023361, 1692346747225524397926264080, 1393672439437011815394433559653]

cp's OEIS Frontend

A359739 a(n) = Sum_{j=0..n, j even} binomial(n, j) * oddfactorial(j/2) * n^j, where oddfactorial(n) = (2n)! / (2^nn!).

Table of values

List of values

cp's OEIS Frontend

A359739 a(n) = Sum_{j=0..n, j even} binomial(n, j) * oddfactorial(j/2) * n^j, where oddfactorial(n) = (2*n)! / (2^n*n!).

Table of values

List of values

A359739 a(n) = Sum_{j=0..n, j even} binomial(n, j) * oddfactorial(j/2) * n^j, where oddfactorial(n) = (2n)! / (2^nn!).