A133346 - cp's OEIS frontend

A133346 a(n) = smallest k such that prime(n+2) = prime(n) + (prime(n) mod k), or 0 if no such k exists.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	7
7	11
8	0
9	15
10	21
11	21
12	31
13	7
14	11
15	35
16	9
17	17
18	17
19	61
20	9
21	21
22	23
23	23
24	77
25	7
26	19
27	97
28	101
29	91
30	19
31	13
32	41
33	25
34	127
35	47
36	139
37	21
38	17
39	31
40	11
41	167
42	13
43	37
44	11
45	61
46	25
47	39
48	7
49	13
50	73
51	9
52	227
53	25
54	239
55	35
56	15
57	9
58	29
59	271
60	269
61	37
62	25
63	7
64	61
65	59
66	27
67	21
68	13
69	11
70	113
71	113

[0, 0, 0, 0, 0, 7, 11, 0, 15, 21, 21, 31, 7, 11, 35, 9, 17, 17, 61, 9, 21, 23, 23, 77, 7, 19, 97, 101, 91, 19, 13, 41, 25, 127, 47, 139, 21, 17, 31, 11, 167, 13, 37, 11, 61, 25, 39, 7, 13, 73, 9, 227, 25, 239, 35, 15, 9, 29, 271, 269, 37, 25, 7, 61, 59, 27, 21, 13, 11, 113, 113]

cp's OEIS Frontend

A133346 a(n) = smallest k such that prime(n+2) = prime(n) + (prime(n) mod k), or 0 if no such k exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	7
7	11
8	0
9	15
10	21
11	21
12	31
13	7
14	11
15	35
16	9
17	17
18	17
19	61
20	9
21	21
22	23
23	23
24	77
25	7
26	19
27	97
28	101
29	91
30	19
31	13
32	41
33	25
34	127
35	47
36	139
37	21
38	17
39	31
40	11
41	167
42	13
43	37
44	11
45	61
46	25
47	39
48	7
49	13
50	73
51	9
52	227
53	25
54	239
55	35
56	15
57	9
58	29
59	271
60	269
61	37
62	25
63	7
64	61
65	59
66	27
67	21
68	13
69	11
70	113
71	113

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	7
7	11
8	0
9	15
10	21
11	21
12	31
13	7
14	11
15	35
16	9
17	17
18	17
19	61
20	9
21	21
22	23
23	23
24	77
25	7
26	19
27	97
28	101
29	91
30	19
31	13
32	41
33	25
34	127
35	47
36	139
37	21
38	17
39	31
40	11
41	167
42	13
43	37
44	11
45	61
46	25
47	39
48	7
49	13
50	73
51	9
52	227
53	25
54	239
55	35
56	15
57	9
58	29
59	271
60	269
61	37
62	25
63	7
64	61
65	59
66	27
67	21
68	13
69	11
70	113
71	113

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	7
7	11
8	0
9	15
10	21
11	21
12	31
13	7
14	11
15	35
16	9
17	17
18	17
19	61
20	9
21	21
22	23
23	23
24	77
25	7
26	19
27	97
28	101
29	91
30	19
31	13
32	41
33	25
34	127
35	47
36	139
37	21
38	17
39	31
40	11
41	167
42	13
43	37
44	11
45	61
46	25
47	39
48	7
49	13
50	73
51	9
52	227
53	25
54	239
55	35
56	15
57	9
58	29
59	271
60	269
61	37
62	25
63	7
64	61
65	59
66	27
67	21
68	13
69	11
70	113
71	113