A127356 - cp's OEIS frontend

A127356 a(n) is the smallest k > 0 such that k^2 + prime(n) is prime.

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

[1, 2, 6, 2, 6, 2, 6, 2, 6, 12, 4, 2, 24, 2, 6, 6, 18, 6, 2, 6, 4, 2, 12, 12, 2, 6, 2, 12, 2, 6, 2, 6, 6, 10, 12, 4, 4, 2, 12, 12, 18, 4, 6, 2, 6, 8, 4, 2, 6, 2, 6, 12, 4, 24, 6, 18, 18, 6, 2, 6, 8, 18, 2, 6, 2, 6, 4, 4, 6, 2, 6, 12, 4, 4, 2, 6, 30, 2, 24, 10]

cp's OEIS Frontend

A127356 a(n) is the smallest k > 0 such that k^2 + prime(n) is prime.

Table of values

List of values

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

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

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