A190268 - cp's OEIS frontend

A190268 Number of ways to express the n-th average of a twin prime pair as the arithmetic mean of a lower and an upper twin prime.

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

[1, 1, 3, 3, 3, 3, 5, 5, 5, 3, 3, 13, 3, 5, 1, 3, 7, 9, 5, 7, 1, 15, 5, 7, 3, 9, 9, 3, 7, 13, 11, 3, 3, 7, 9, 13, 3, 23, 13, 15, 7, 13, 5, 21, 11, 9, 9, 13, 9, 5, 3, 15, 3, 9, 11, 9, 9, 9, 17, 15, 5, 7, 9, 7, 7, 21, 19, 7, 11, 43, 35, 11, 25, 11, 5, 7, 7, 37, 27, 9]

cp's OEIS Frontend

A190268 Number of ways to express the n-th average of a twin prime pair as the arithmetic mean of a lower and an upper twin prime.

Table of values

List of values

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

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

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