A087893 - cp's OEIS frontend

A087893 Number of numbers m satisfying 1 < m < n such that m^2 == m (mod n).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	2
16	0
17	0
18	2
19	0
20	2
21	2
22	2
23	0
24	2
25	0
26	2
27	0
28	2
29	0
30	6
31	0
32	0
33	2
34	2
35	2
36	2
37	0
38	2
39	2
40	2
41	0
42	6
43	0
44	2
45	2
46	2
47	0
48	2
49	0
50	2
51	2
52	2
53	0
54	2
55	2
56	2
57	2
58	2
59	0
60	6
61	0
62	2
63	2
64	0
65	2
66	6
67	0
68	2
69	2
70	6
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	6
79	0
80	2
81	0
82	2
83	0
84	6
85	2
86	2
87	2
88	2
89	0
90	6
91	2
92	2
93	2
94	2
95	2
96	2
97	0
98	2
99	2
100	2
101	0
102	6
103	0
104	2
105	6

[0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 2, 0, 2, 2, 0, 0, 2, 0, 2, 2, 2, 0, 2, 0, 2, 0, 2, 0, 6, 0, 0, 2, 2, 2, 2, 0, 2, 2, 2, 0, 6, 0, 2, 2, 2, 0, 2, 0, 2, 2, 2, 0, 2, 2, 2, 2, 2, 0, 6, 0, 2, 2, 0, 2, 6, 0, 2, 2, 6, 0, 2, 0, 2, 2, 2, 2, 6, 0, 2, 0, 2, 0, 6, 2, 2, 2, 2, 0, 6, 2, 2, 2, 2, 2, 2, 0, 2, 2, 2, 0, 6, 0, 2, 6]

cp's OEIS Frontend

A087893 Number of numbers m satisfying 1 < m < n such that m^2 == m (mod n).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	2
16	0
17	0
18	2
19	0
20	2
21	2
22	2
23	0
24	2
25	0
26	2
27	0
28	2
29	0
30	6
31	0
32	0
33	2
34	2
35	2
36	2
37	0
38	2
39	2
40	2
41	0
42	6
43	0
44	2
45	2
46	2
47	0
48	2
49	0
50	2
51	2
52	2
53	0
54	2
55	2
56	2
57	2
58	2
59	0
60	6
61	0
62	2
63	2
64	0
65	2
66	6
67	0
68	2
69	2
70	6
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	6
79	0
80	2
81	0
82	2
83	0
84	6
85	2
86	2
87	2
88	2
89	0
90	6
91	2
92	2
93	2
94	2
95	2
96	2
97	0
98	2
99	2
100	2
101	0
102	6
103	0
104	2
105	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	2
16	0
17	0
18	2
19	0
20	2
21	2
22	2
23	0
24	2
25	0
26	2
27	0
28	2
29	0
30	6
31	0
32	0
33	2
34	2
35	2
36	2
37	0
38	2
39	2
40	2
41	0
42	6
43	0
44	2
45	2
46	2
47	0
48	2
49	0
50	2
51	2
52	2
53	0
54	2
55	2
56	2
57	2
58	2
59	0
60	6
61	0
62	2
63	2
64	0
65	2
66	6
67	0
68	2
69	2
70	6
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	6
79	0
80	2
81	0
82	2
83	0
84	6
85	2
86	2
87	2
88	2
89	0
90	6
91	2
92	2
93	2
94	2
95	2
96	2
97	0
98	2
99	2
100	2
101	0
102	6
103	0
104	2
105	6

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	2
13	0
14	2
15	2
16	0
17	0
18	2
19	0
20	2
21	2
22	2
23	0
24	2
25	0
26	2
27	0
28	2
29	0
30	6
31	0
32	0
33	2
34	2
35	2
36	2
37	0
38	2
39	2
40	2
41	0
42	6
43	0
44	2
45	2
46	2
47	0
48	2
49	0
50	2
51	2
52	2
53	0
54	2
55	2
56	2
57	2
58	2
59	0
60	6
61	0
62	2
63	2
64	0
65	2
66	6
67	0
68	2
69	2
70	6
71	0
72	2
73	0
74	2
75	2
76	2
77	2
78	6
79	0
80	2
81	0
82	2
83	0
84	6
85	2
86	2
87	2
88	2
89	0
90	6
91	2
92	2
93	2
94	2
95	2
96	2
97	0
98	2
99	2
100	2
101	0
102	6
103	0
104	2
105	6