A242830 - cp's OEIS frontend

A242830 For p = prime(n), a(n) = number of bases 1 < b < p such that b^(p-1) == 1 (mod p^2).

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	2
21	0
22	1
23	0
24	0
25	1
26	0
27	1
28	0
29	1
30	1
31	2
32	2
33	1
34	0
35	0
36	1
37	0
38	2
39	0
40	0
41	0
42	1
43	1
44	0
45	1
46	1
47	2
48	1
49	0
50	2
51	1
52	0
53	1
54	0
55	1
56	1
57	3
58	0
59	0
60	1
61	1
62	1
63	1
64	0
65	2
66	0
67	3
68	0
69	2
70	2
71	2
72	2
73	2
74	1
75	1
76	0
77	0
78	1
79	1
80	0
81	1
82	1
83	0
84	1
85	1
86	0
87	1
88	0
89	1
90	2
91	0
92	0
93	4
94	0
95	1

[0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 2, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 2, 2, 1, 0, 0, 1, 0, 2, 0, 0, 0, 1, 1, 0, 1, 1, 2, 1, 0, 2, 1, 0, 1, 0, 1, 1, 3, 0, 0, 1, 1, 1, 1, 0, 2, 0, 3, 0, 2, 2, 2, 2, 2, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 2, 0, 0, 4, 0, 1]

cp's OEIS Frontend

A242830 For p = prime(n), a(n) = number of bases 1 < b < p such that b^(p-1) == 1 (mod p^2).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	2
21	0
22	1
23	0
24	0
25	1
26	0
27	1
28	0
29	1
30	1
31	2
32	2
33	1
34	0
35	0
36	1
37	0
38	2
39	0
40	0
41	0
42	1
43	1
44	0
45	1
46	1
47	2
48	1
49	0
50	2
51	1
52	0
53	1
54	0
55	1
56	1
57	3
58	0
59	0
60	1
61	1
62	1
63	1
64	0
65	2
66	0
67	3
68	0
69	2
70	2
71	2
72	2
73	2
74	1
75	1
76	0
77	0
78	1
79	1
80	0
81	1
82	1
83	0
84	1
85	1
86	0
87	1
88	0
89	1
90	2
91	0
92	0
93	4
94	0
95	1

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	2
21	0
22	1
23	0
24	0
25	1
26	0
27	1
28	0
29	1
30	1
31	2
32	2
33	1
34	0
35	0
36	1
37	0
38	2
39	0
40	0
41	0
42	1
43	1
44	0
45	1
46	1
47	2
48	1
49	0
50	2
51	1
52	0
53	1
54	0
55	1
56	1
57	3
58	0
59	0
60	1
61	1
62	1
63	1
64	0
65	2
66	0
67	3
68	0
69	2
70	2
71	2
72	2
73	2
74	1
75	1
76	0
77	0
78	1
79	1
80	0
81	1
82	1
83	0
84	1
85	1
86	0
87	1
88	0
89	1
90	2
91	0
92	0
93	4
94	0
95	1

n	a(n)
1	0
2	0
3	0
4	0
5	2
6	0
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	2
21	0
22	1
23	0
24	0
25	1
26	0
27	1
28	0
29	1
30	1
31	2
32	2
33	1
34	0
35	0
36	1
37	0
38	2
39	0
40	0
41	0
42	1
43	1
44	0
45	1
46	1
47	2
48	1
49	0
50	2
51	1
52	0
53	1
54	0
55	1
56	1
57	3
58	0
59	0
60	1
61	1
62	1
63	1
64	0
65	2
66	0
67	3
68	0
69	2
70	2
71	2
72	2
73	2
74	1
75	1
76	0
77	0
78	1
79	1
80	0
81	1
82	1
83	0
84	1
85	1
86	0
87	1
88	0
89	1
90	2
91	0
92	0
93	4
94	0
95	1