A239146 - cp's OEIS frontend

A239146 Smallest k>0 such that n +/- k and n^2 +/- k are all prime. a(n) = 0 if no such number exists.

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

[0, 0, 0, 0, 0, 0, 0, 3, 2, 3, 0, 5, 0, 3, 2, 0, 0, 13, 12, 0, 2, 0, 0, 0, 6, 15, 10, 0, 12, 0, 0, 15, 20, 0, 12, 5, 0, 15, 22, 21, 12, 0, 0, 0, 14, 27, 0, 35, 0, 0, 8, 15, 0, 0, 24, 27, 0, 0, 48, 7, 48, 0, 50, 3, 6, 7, 0, 0, 28, 0, 18, 0, 0, 27, 34]

cp's OEIS Frontend

A239146 Smallest k>0 such that n +/- k and n^2 +/- k are all prime. a(n) = 0 if no such number exists.

Table of values

List of values

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

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

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