A087611 - cp's OEIS frontend

A087611 a(n) = (prime(n) - 1) mod n.

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

[0, 0, 1, 2, 0, 0, 2, 2, 4, 8, 8, 0, 1, 0, 1, 4, 7, 6, 9, 10, 9, 12, 13, 16, 21, 22, 21, 22, 21, 22, 2, 2, 4, 2, 8, 6, 8, 10, 10, 12, 14, 12, 18, 16, 16, 14, 22, 30, 30, 28, 28, 30, 28, 34, 36, 38, 40, 38, 40, 40, 38, 44, 54, 54, 52, 52, 62, 64, 1, 68, 68, 70, 1, 2, 3, 2, 3, 6, 5, 8]

cp's OEIS Frontend

A087611 a(n) = (prime(n) - 1) mod n.

Table of values

List of values

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

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

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