A261628 - cp's OEIS frontend

A261628 Least prime p such that n-(pn'-1) and n+(pn'-1) are both prime where n' = (3+(-1)^n)/2, or 0 if no such prime p exists.

n	a(n)
1	0
2	0
3	0
4	0
5	3
6	0
7	5
8	2
9	3
10	2
11	7
12	3
13	7
14	2
15	3
16	2
17	7
18	3
19	13
20	2
21	3
22	5
23	7
24	3
25	7
26	2
27	5
28	5
29	13
30	7
31	13
32	5
33	5
34	2
35	7
36	3
37	7
38	5
39	3
40	2
41	13
42	3
43	31
44	2
45	3
46	17
47	7
48	3
49	13
50	2
51	11
52	5
53	7
54	7
55	13
56	2
57	5
58	11
59	13
60	7
61	19
62	5
63	5
64	2
65	7
66	3
67	7
68	11
69	3
70	2
71	13
72	13
73	7
74	17
75	5
76	2
77	7
78	3
79	19
80	5

[0, 0, 0, 0, 3, 0, 5, 2, 3, 2, 7, 3, 7, 2, 3, 2, 7, 3, 13, 2, 3, 5, 7, 3, 7, 2, 5, 5, 13, 7, 13, 5, 5, 2, 7, 3, 7, 5, 3, 2, 13, 3, 31, 2, 3, 17, 7, 3, 13, 2, 11, 5, 7, 7, 13, 2, 5, 11, 13, 7, 19, 5, 5, 2, 7, 3, 7, 11, 3, 2, 13, 13, 7, 17, 5, 2, 7, 3, 19, 5]

cp's OEIS Frontend

A261628 Least prime p such that n-(pn'-1) and n+(pn'-1) are both prime where n' = (3+(-1)^n)/2, or 0 if no such prime p exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	3
6	0
7	5
8	2
9	3
10	2
11	7
12	3
13	7
14	2
15	3
16	2
17	7
18	3
19	13
20	2
21	3
22	5
23	7
24	3
25	7
26	2
27	5
28	5
29	13
30	7
31	13
32	5
33	5
34	2
35	7
36	3
37	7
38	5
39	3
40	2
41	13
42	3
43	31
44	2
45	3
46	17
47	7
48	3
49	13
50	2
51	11
52	5
53	7
54	7
55	13
56	2
57	5
58	11
59	13
60	7
61	19
62	5
63	5
64	2
65	7
66	3
67	7
68	11
69	3
70	2
71	13
72	13
73	7
74	17
75	5
76	2
77	7
78	3
79	19
80	5

n	a(n)
1	0
2	0
3	0
4	0
5	3
6	0
7	5
8	2
9	3
10	2
11	7
12	3
13	7
14	2
15	3
16	2
17	7
18	3
19	13
20	2
21	3
22	5
23	7
24	3
25	7
26	2
27	5
28	5
29	13
30	7
31	13
32	5
33	5
34	2
35	7
36	3
37	7
38	5
39	3
40	2
41	13
42	3
43	31
44	2
45	3
46	17
47	7
48	3
49	13
50	2
51	11
52	5
53	7
54	7
55	13
56	2
57	5
58	11
59	13
60	7
61	19
62	5
63	5
64	2
65	7
66	3
67	7
68	11
69	3
70	2
71	13
72	13
73	7
74	17
75	5
76	2
77	7
78	3
79	19
80	5

cp's OEIS Frontend

A261628 Least prime p such that n-(p*n'-1) and n+(p*n'-1) are both prime where n' = (3+(-1)^n)/2, or 0 if no such prime p exists.

Table of values

List of values

A261628 Least prime p such that n-(pn'-1) and n+(pn'-1) are both prime where n' = (3+(-1)^n)/2, or 0 if no such prime p exists.

n	a(n)
1	0
2	0
3	0
4	0
5	3
6	0
7	5
8	2
9	3
10	2
11	7
12	3
13	7
14	2
15	3
16	2
17	7
18	3
19	13
20	2
21	3
22	5
23	7
24	3
25	7
26	2
27	5
28	5
29	13
30	7
31	13
32	5
33	5
34	2
35	7
36	3
37	7
38	5
39	3
40	2
41	13
42	3
43	31
44	2
45	3
46	17
47	7
48	3
49	13
50	2
51	11
52	5
53	7
54	7
55	13
56	2
57	5
58	11
59	13
60	7
61	19
62	5
63	5
64	2
65	7
66	3
67	7
68	11
69	3
70	2
71	13
72	13
73	7
74	17
75	5
76	2
77	7
78	3
79	19
80	5