A004650 - cp's OEIS frontend

A004650 a(n) = prime(n) mod (n+1).

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

[0, 0, 1, 2, 5, 6, 1, 1, 3, 7, 7, 11, 13, 13, 15, 2, 5, 4, 7, 8, 7, 10, 11, 14, 19, 20, 19, 20, 19, 20, 31, 32, 1, 34, 5, 3, 5, 7, 7, 9, 11, 9, 15, 13, 13, 11, 19, 27, 27, 25, 25, 27, 25, 31, 33, 35, 37, 35, 37, 37, 35, 41, 51, 51, 49, 49, 59, 61, 67, 65, 65, 67]

cp's OEIS Frontend

A004650 a(n) = prime(n) mod (n+1).

Table of values

List of values

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

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

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