A177460 - cp's OEIS frontend

A177460 Smallest k such that A000217(n)+k and A000217(n)-k are both prime.

n	a(n)
2	0
3	1
4	3
5	2
6	2
7	9
8	5
9	2
10	12
11	5
12	5
13	12
14	2
15	7
16	27
17	4
18	8
19	9
20	13
21	2
22	24
23	5
24	7
25	12
26	2
27	5
28	27
29	4
30	2
31	75
32	19
33	38
34	18
35	11
36	7
37	30
38	2
39	7
40	9
41	2
42	16
43	63
44	7
45	4
46	12
47	25
48	5
49	12
50	16
51	35
52	51
53	2
54	2
55	9
56	13
57	16
58	12
59	17
60	41
61	60
62	20
63	13
64	51
65	8
66	32
67	9
68	5
69	22
70	18
71	35
72	19
73	12
74	22
75	7
76	75
77	34
78	2
79	93
80	11
81	2
82	30
83	25
84	11

[0, 1, 3, 2, 2, 9, 5, 2, 12, 5, 5, 12, 2, 7, 27, 4, 8, 9, 13, 2, 24, 5, 7, 12, 2, 5, 27, 4, 2, 75, 19, 38, 18, 11, 7, 30, 2, 7, 9, 2, 16, 63, 7, 4, 12, 25, 5, 12, 16, 35, 51, 2, 2, 9, 13, 16, 12, 17, 41, 60, 20, 13, 51, 8, 32, 9, 5, 22, 18, 35, 19, 12, 22, 7, 75, 34, 2, 93, 11, 2, 30, 25, 11]

cp's OEIS Frontend

A177460 Smallest k such that A000217(n)+k and A000217(n)-k are both prime.

Table of values

List of values

n	a(n)
2	0
3	1
4	3
5	2
6	2
7	9
8	5
9	2
10	12
11	5
12	5
13	12
14	2
15	7
16	27
17	4
18	8
19	9
20	13
21	2
22	24
23	5
24	7
25	12
26	2
27	5
28	27
29	4
30	2
31	75
32	19
33	38
34	18
35	11
36	7
37	30
38	2
39	7
40	9
41	2
42	16
43	63
44	7
45	4
46	12
47	25
48	5
49	12
50	16
51	35
52	51
53	2
54	2
55	9
56	13
57	16
58	12
59	17
60	41
61	60
62	20
63	13
64	51
65	8
66	32
67	9
68	5
69	22
70	18
71	35
72	19
73	12
74	22
75	7
76	75
77	34
78	2
79	93
80	11
81	2
82	30
83	25
84	11

n	a(n)
2	0
3	1
4	3
5	2
6	2
7	9
8	5
9	2
10	12
11	5
12	5
13	12
14	2
15	7
16	27
17	4
18	8
19	9
20	13
21	2
22	24
23	5
24	7
25	12
26	2
27	5
28	27
29	4
30	2
31	75
32	19
33	38
34	18
35	11
36	7
37	30
38	2
39	7
40	9
41	2
42	16
43	63
44	7
45	4
46	12
47	25
48	5
49	12
50	16
51	35
52	51
53	2
54	2
55	9
56	13
57	16
58	12
59	17
60	41
61	60
62	20
63	13
64	51
65	8
66	32
67	9
68	5
69	22
70	18
71	35
72	19
73	12
74	22
75	7
76	75
77	34
78	2
79	93
80	11
81	2
82	30
83	25
84	11

n	a(n)
2	0
3	1
4	3
5	2
6	2
7	9
8	5
9	2
10	12
11	5
12	5
13	12
14	2
15	7
16	27
17	4
18	8
19	9
20	13
21	2
22	24
23	5
24	7
25	12
26	2
27	5
28	27
29	4
30	2
31	75
32	19
33	38
34	18
35	11
36	7
37	30
38	2
39	7
40	9
41	2
42	16
43	63
44	7
45	4
46	12
47	25
48	5
49	12
50	16
51	35
52	51
53	2
54	2
55	9
56	13
57	16
58	12
59	17
60	41
61	60
62	20
63	13
64	51
65	8
66	32
67	9
68	5
69	22
70	18
71	35
72	19
73	12
74	22
75	7
76	75
77	34
78	2
79	93
80	11
81	2
82	30
83	25
84	11