A337121 - cp's OEIS frontend

A337121 a(n) is the number of ways the n-th prime number prime(n) can be represented as sum of two smaller odd prime numbers p1, p2 with prime(n) > p1 > (p2 minus the maximum odd prime factor of (p1-p2)).

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

[1, 1, 2, 3, 2, 2, 4, 3, 3, 5, 3, 6, 4, 4, 4, 7, 4, 4, 5, 6, 6, 6, 9, 7, 8, 8, 7, 7, 6, 11, 4, 11, 9, 7, 8, 9, 7, 13, 12, 6, 10, 15, 10, 9, 7, 13, 13, 11, 13, 10, 15, 10, 13, 14, 11, 13, 13, 12, 14, 17, 13, 13, 19, 9, 14, 19, 12, 8, 14, 22, 17, 14, 13, 16, 9, 15]

cp's OEIS Frontend

A337121 a(n) is the number of ways the n-th prime number prime(n) can be represented as sum of two smaller odd prime numbers p1, p2 with prime(n) > p1 > (p2 minus the maximum odd prime factor of (p1-p2)).

Table of values

List of values

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

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

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