A301510 - cp's OEIS frontend

A301510 Smallest positive number b such that ((b+1)^prime(n) + b^prime(n))/(2*b + 1) is prime, or 0 if no such b exists.

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	3
13	16
14	1
15	11
16	6
17	37
18	1
19	9
20	120
21	9
22	1
23	2
24	67
25	16
26	1
27	26
28	103
29	12
30	60
31	1
32	239
33	4
34	40
35	2
36	44
37	174
38	33
39	1
40	3
41	260
42	114
43	1
44	161
45	70
46	1
47	3
48	2
49	3
50	50
51	45
52	472
53	228
54	183
55	66
56	37
57	7
58	122
59	235
60	68
61	102
62	294
63	8
64	13
65	1
66	40
67	62
68	143
69	1
70	61
71	7

[1, 1, 1, 1, 1, 1, 1, 1, 4, 1, 3, 16, 1, 11, 6, 37, 1, 9, 120, 9, 1, 2, 67, 16, 1, 26, 103, 12, 60, 1, 239, 4, 40, 2, 44, 174, 33, 1, 3, 260, 114, 1, 161, 70, 1, 3, 2, 3, 50, 45, 472, 228, 183, 66, 37, 7, 122, 235, 68, 102, 294, 8, 13, 1, 40, 62, 143, 1, 61, 7]

cp's OEIS Frontend

A301510 Smallest positive number b such that ((b+1)^prime(n) + b^prime(n))/(2*b + 1) is prime, or 0 if no such b exists.

Table of values

List of values

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	3
13	16
14	1
15	11
16	6
17	37
18	1
19	9
20	120
21	9
22	1
23	2
24	67
25	16
26	1
27	26
28	103
29	12
30	60
31	1
32	239
33	4
34	40
35	2
36	44
37	174
38	33
39	1
40	3
41	260
42	114
43	1
44	161
45	70
46	1
47	3
48	2
49	3
50	50
51	45
52	472
53	228
54	183
55	66
56	37
57	7
58	122
59	235
60	68
61	102
62	294
63	8
64	13
65	1
66	40
67	62
68	143
69	1
70	61
71	7

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	3
13	16
14	1
15	11
16	6
17	37
18	1
19	9
20	120
21	9
22	1
23	2
24	67
25	16
26	1
27	26
28	103
29	12
30	60
31	1
32	239
33	4
34	40
35	2
36	44
37	174
38	33
39	1
40	3
41	260
42	114
43	1
44	161
45	70
46	1
47	3
48	2
49	3
50	50
51	45
52	472
53	228
54	183
55	66
56	37
57	7
58	122
59	235
60	68
61	102
62	294
63	8
64	13
65	1
66	40
67	62
68	143
69	1
70	61
71	7

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	4
11	1
12	3
13	16
14	1
15	11
16	6
17	37
18	1
19	9
20	120
21	9
22	1
23	2
24	67
25	16
26	1
27	26
28	103
29	12
30	60
31	1
32	239
33	4
34	40
35	2
36	44
37	174
38	33
39	1
40	3
41	260
42	114
43	1
44	161
45	70
46	1
47	3
48	2
49	3
50	50
51	45
52	472
53	228
54	183
55	66
56	37
57	7
58	122
59	235
60	68
61	102
62	294
63	8
64	13
65	1
66	40
67	62
68	143
69	1
70	61
71	7