A178609 - cp's OEIS frontend

A178609 Largest k < n such that prime(n-k) + prime(n+k) = 2*prime(n).

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	2
7	2
8	0
9	0
10	5
11	3
12	6
13	4
14	0
15	0
16	7
17	7
18	4
19	8
20	10
21	0
22	0
23	7
24	4
25	11
26	6
27	2
28	2
29	0
30	0
31	13
32	9
33	10
34	12
35	0
36	2
37	16
38	0
39	6
40	12
41	13
42	4
43	19
44	17
45	15
46	0
47	18
48	0
49	0
50	0
51	11
52	0
53	0
54	3
55	1
56	1
57	0
58	0
59	6
60	0
61	0
62	0
63	27
64	13
65	0
66	0
67	17
68	5
69	29
70	23
71	26
72	20
73	26
74	11
75	7
76	21
77	20
78	15
79	19
80	34
81	21
82	2
83	21
84	11
85	10
86	10
87	10
88	27
89	3
90	0
91	0
92	5
93	32
94	2
95	0
96	0
97	0
98	26
99	0
100	33

[0, 0, 1, 0, 3, 2, 2, 0, 0, 5, 3, 6, 4, 0, 0, 7, 7, 4, 8, 10, 0, 0, 7, 4, 11, 6, 2, 2, 0, 0, 13, 9, 10, 12, 0, 2, 16, 0, 6, 12, 13, 4, 19, 17, 15, 0, 18, 0, 0, 0, 11, 0, 0, 3, 1, 1, 0, 0, 6, 0, 0, 0, 27, 13, 0, 0, 17, 5, 29, 23, 26, 20, 26, 11, 7, 21, 20, 15, 19, 34, 21, 2, 21, 11, 10, 10, 10, 27, 3, 0, 0, 5, 32, 2, 0, 0, 0, 26, 0, 33]

cp's OEIS Frontend

A178609 Largest k < n such that prime(n-k) + prime(n+k) = 2*prime(n).

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	2
7	2
8	0
9	0
10	5
11	3
12	6
13	4
14	0
15	0
16	7
17	7
18	4
19	8
20	10
21	0
22	0
23	7
24	4
25	11
26	6
27	2
28	2
29	0
30	0
31	13
32	9
33	10
34	12
35	0
36	2
37	16
38	0
39	6
40	12
41	13
42	4
43	19
44	17
45	15
46	0
47	18
48	0
49	0
50	0
51	11
52	0
53	0
54	3
55	1
56	1
57	0
58	0
59	6
60	0
61	0
62	0
63	27
64	13
65	0
66	0
67	17
68	5
69	29
70	23
71	26
72	20
73	26
74	11
75	7
76	21
77	20
78	15
79	19
80	34
81	21
82	2
83	21
84	11
85	10
86	10
87	10
88	27
89	3
90	0
91	0
92	5
93	32
94	2
95	0
96	0
97	0
98	26
99	0
100	33

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	2
7	2
8	0
9	0
10	5
11	3
12	6
13	4
14	0
15	0
16	7
17	7
18	4
19	8
20	10
21	0
22	0
23	7
24	4
25	11
26	6
27	2
28	2
29	0
30	0
31	13
32	9
33	10
34	12
35	0
36	2
37	16
38	0
39	6
40	12
41	13
42	4
43	19
44	17
45	15
46	0
47	18
48	0
49	0
50	0
51	11
52	0
53	0
54	3
55	1
56	1
57	0
58	0
59	6
60	0
61	0
62	0
63	27
64	13
65	0
66	0
67	17
68	5
69	29
70	23
71	26
72	20
73	26
74	11
75	7
76	21
77	20
78	15
79	19
80	34
81	21
82	2
83	21
84	11
85	10
86	10
87	10
88	27
89	3
90	0
91	0
92	5
93	32
94	2
95	0
96	0
97	0
98	26
99	0
100	33

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	2
7	2
8	0
9	0
10	5
11	3
12	6
13	4
14	0
15	0
16	7
17	7
18	4
19	8
20	10
21	0
22	0
23	7
24	4
25	11
26	6
27	2
28	2
29	0
30	0
31	13
32	9
33	10
34	12
35	0
36	2
37	16
38	0
39	6
40	12
41	13
42	4
43	19
44	17
45	15
46	0
47	18
48	0
49	0
50	0
51	11
52	0
53	0
54	3
55	1
56	1
57	0
58	0
59	6
60	0
61	0
62	0
63	27
64	13
65	0
66	0
67	17
68	5
69	29
70	23
71	26
72	20
73	26
74	11
75	7
76	21
77	20
78	15
79	19
80	34
81	21
82	2
83	21
84	11
85	10
86	10
87	10
88	27
89	3
90	0
91	0
92	5
93	32
94	2
95	0
96	0
97	0
98	26
99	0
100	33