A191311 - cp's OEIS frontend

A191311 Numbers n such that exactly half of the a such that 0 and (a,n)=1 satisfy a^(n-1) = 1 (mod n).

n	a(n)
1	4
2	6
3	15
4	91
5	703
6	1891
7	2701
8	11305
9	12403
10	13981
11	18721
12	23001
13	30889
14	38503
15	39865
16	49141
17	68101
18	79003
19	88561
20	88831
21	91001
22	93961
23	104653
24	107185
25	137149
26	146611
27	152551
28	157641
29	176149
30	188191
31	204001
32	218791
33	226801
34	228241

[4, 6, 15, 91, 703, 1891, 2701, 11305, 12403, 13981, 18721, 23001, 30889, 38503, 39865, 49141, 68101, 79003, 88561, 88831, 91001, 93961, 104653, 107185, 137149, 146611, 152551, 157641, 176149, 188191, 204001, 218791, 226801, 228241]

cp's OEIS Frontend

A191311 Numbers n such that exactly half of the a such that 0 and (a,n)=1 satisfy a^(n-1) = 1 (mod n).

Table of values

List of values