A212957 - cp's OEIS frontend

A212957 A(n,k) is the number of moduli m such that the multiplicative order of k mod m equals n; square array A(n,k), n>=1, k>=1, read by antidiagonals.

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

[0, 1, 0, 2, 1, 0, 2, 2, 1, 0, 3, 2, 2, 2, 0, 2, 5, 4, 6, 1, 0, 4, 2, 3, 4, 4, 3, 0, 2, 6, 2, 12, 6, 10, 1, 0, 4, 4, 8, 4, 9, 16, 2, 4, 0, 3, 6, 2, 26, 4, 37, 6, 14, 2, 0, 4, 3, 12, 18, 4, 10, 3, 8, 4, 5, 0, 2, 12, 5, 14, 6, 42, 2, 28, 26, 16, 3, 0]

cp's OEIS Frontend

A212957 A(n,k) is the number of moduli m such that the multiplicative order of k mod m equals n; square array A(n,k), n>=1, k>=1, read by antidiagonals.

Table of values

List of values

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

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

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