A124441 - cp's OEIS frontend

A124441 a(n) = Product_{1<=k<=n/2, gcd(k,n)=1} k.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	6
8	3
9	8
10	3
11	120
12	5
13	720
14	15
15	56
16	105
17	40320
18	35
19	362880
20	189
21	3200
22	945
23	39916800
24	385
25	9580032
26	10395
27	3203200
28	19305
29	87178291200
30	1001
31	1307674368000
32	2027025
33	65228800
34	2027025
35	4839284736
36	85085
37	6402373705728000
38	34459425
39	17827532800

[1, 1, 1, 1, 2, 1, 6, 3, 8, 3, 120, 5, 720, 15, 56, 105, 40320, 35, 362880, 189, 3200, 945, 39916800, 385, 9580032, 10395, 3203200, 19305, 87178291200, 1001, 1307674368000, 2027025, 65228800, 2027025, 4839284736, 85085, 6402373705728000, 34459425, 17827532800]

cp's OEIS Frontend

A124441 a(n) = Product_{1<=k<=n/2, gcd(k,n)=1} k.

Table of values

List of values