A238289 - cp's OEIS frontend

A238289 Least positive integer k such that prime(kn), prime((k+1)n) and prime((k+2)*n) form an arithmetic progression, or 0 if such a number k does not exist.

n	a(n)
1	2
2	2
3	17
4	4
5	1
6	1
7	59
8	3
9	56
10	1
11	39
12	10
13	9
14	130
15	2
16	18
17	11
18	7
19	80
20	67
21	2
22	19
23	27
24	17
25	92
26	73
27	180
28	65
29	5
30	110
31	282
32	4
33	6
34	8
35	16
36	2
37	23
38	198
39	20
40	3
41	99
42	83
43	217
44	13
45	110
46	28
47	16
48	6
49	5
50	3
51	144
52	31
53	9
54	187
55	176
56	145
57	75
58	11
59	43
60	424
61	4
62	54
63	272
64	8
65	26
66	131
67	123
68	107
69	8
70	4
71	52
72	9
73	127
74	84
75	264
76	33
77	145
78	663
79	16
80	285

[2, 2, 17, 4, 1, 1, 59, 3, 56, 1, 39, 10, 9, 130, 2, 18, 11, 7, 80, 67, 2, 19, 27, 17, 92, 73, 180, 65, 5, 110, 282, 4, 6, 8, 16, 2, 23, 198, 20, 3, 99, 83, 217, 13, 110, 28, 16, 6, 5, 3, 144, 31, 9, 187, 176, 145, 75, 11, 43, 424, 4, 54, 272, 8, 26, 131, 123, 107, 8, 4, 52, 9, 127, 84, 264, 33, 145, 663, 16, 285]

cp's OEIS Frontend

A238289 Least positive integer k such that prime(kn), prime((k+1)n) and prime((k+2)*n) form an arithmetic progression, or 0 if such a number k does not exist.

Table of values

List of values

n	a(n)
1	2
2	2
3	17
4	4
5	1
6	1
7	59
8	3
9	56
10	1
11	39
12	10
13	9
14	130
15	2
16	18
17	11
18	7
19	80
20	67
21	2
22	19
23	27
24	17
25	92
26	73
27	180
28	65
29	5
30	110
31	282
32	4
33	6
34	8
35	16
36	2
37	23
38	198
39	20
40	3
41	99
42	83
43	217
44	13
45	110
46	28
47	16
48	6
49	5
50	3
51	144
52	31
53	9
54	187
55	176
56	145
57	75
58	11
59	43
60	424
61	4
62	54
63	272
64	8
65	26
66	131
67	123
68	107
69	8
70	4
71	52
72	9
73	127
74	84
75	264
76	33
77	145
78	663
79	16
80	285

n	a(n)
1	2
2	2
3	17
4	4
5	1
6	1
7	59
8	3
9	56
10	1
11	39
12	10
13	9
14	130
15	2
16	18
17	11
18	7
19	80
20	67
21	2
22	19
23	27
24	17
25	92
26	73
27	180
28	65
29	5
30	110
31	282
32	4
33	6
34	8
35	16
36	2
37	23
38	198
39	20
40	3
41	99
42	83
43	217
44	13
45	110
46	28
47	16
48	6
49	5
50	3
51	144
52	31
53	9
54	187
55	176
56	145
57	75
58	11
59	43
60	424
61	4
62	54
63	272
64	8
65	26
66	131
67	123
68	107
69	8
70	4
71	52
72	9
73	127
74	84
75	264
76	33
77	145
78	663
79	16
80	285

cp's OEIS Frontend

A238289 Least positive integer k such that prime(k*n), prime((k+1)*n) and prime((k+2)*n) form an arithmetic progression, or 0 if such a number k does not exist.

Table of values

List of values

A238289 Least positive integer k such that prime(kn), prime((k+1)n) and prime((k+2)*n) form an arithmetic progression, or 0 if such a number k does not exist.

n	a(n)
1	2
2	2
3	17
4	4
5	1
6	1
7	59
8	3
9	56
10	1
11	39
12	10
13	9
14	130
15	2
16	18
17	11
18	7
19	80
20	67
21	2
22	19
23	27
24	17
25	92
26	73
27	180
28	65
29	5
30	110
31	282
32	4
33	6
34	8
35	16
36	2
37	23
38	198
39	20
40	3
41	99
42	83
43	217
44	13
45	110
46	28
47	16
48	6
49	5
50	3
51	144
52	31
53	9
54	187
55	176
56	145
57	75
58	11
59	43
60	424
61	4
62	54
63	272
64	8
65	26
66	131
67	123
68	107
69	8
70	4
71	52
72	9
73	127
74	84
75	264
76	33
77	145
78	663
79	16
80	285