A099001 - cp's OEIS frontend

A099001 a(n) = (Sum 1/k) (Product k), where both the sum and product are over those k where 1 <= k <= n/2 and gcd(k,n) = 1.

n	a(n)
2	1
3	1
4	1
5	3
6	1
7	11
8	4
9	14
10	4
11	274
12	6
13	1764
14	23
15	106
16	176
17	109584
18	47
19	1026576
20	300
21	6960
22	1689
23	120543840
24	552
25	26854848
26	19524
27	7962160
28	34986
29	283465647360
30	1312
31	4339163001600
32	4098240
33	164944640
34	4098240
35	13833580032
36	133542
37	22376988058521600
38	71697105

[1, 1, 1, 3, 1, 11, 4, 14, 4, 274, 6, 1764, 23, 106, 176, 109584, 47, 1026576, 300, 6960, 1689, 120543840, 552, 26854848, 19524, 7962160, 34986, 283465647360, 1312, 4339163001600, 4098240, 164944640, 4098240, 13833580032, 133542, 22376988058521600, 71697105]

cp's OEIS Frontend

A099001 a(n) = (Sum 1/k) (Product k), where both the sum and product are over those k where 1 <= k <= n/2 and gcd(k,n) = 1.

Table of values

List of values