A056855 - cp's OEIS frontend

A056855 a(n) = (Product k) * (Sum 1/k), where both the product and the sum are over those positive integers k, where k <= n and gcd(k,n) = 1.

n	a(n)
1	1
2	1
3	3
4	4
5	50
6	6
7	1764
8	176
9	4968
10	300
11	10628640
12	552
13	1486442880
14	34986
15	2024400
16	4098240
17	70734282393600
18	133542
19	22376988058521600
20	16294800
21	121402713600
22	2612325870
23	4148476779335454720000
24	61931424
25	138951136600657920000
26	1330269185700

[1, 1, 3, 4, 50, 6, 1764, 176, 4968, 300, 10628640, 552, 1486442880, 34986, 2024400, 4098240, 70734282393600, 133542, 22376988058521600, 16294800, 121402713600, 2612325870, 4148476779335454720000, 61931424, 138951136600657920000, 1330269185700]

cp's OEIS Frontend

A056855 a(n) = (Product k) * (Sum 1/k), where both the product and the sum are over those positive integers k, where k <= n and gcd(k,n) = 1.

Table of values

List of values