A363992 - cp's OEIS frontend

A363992 The number of ways 2n can be expressed as the sum of an odd prime number and an odd nonprime, both of which are relatively prime to n.

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

[0, 0, 1, 1, 1, 0, 1, 2, 1, 1, 2, 2, 1, 3, 3, 1, 6, 3, 1, 8, 4, 2, 6, 6, 3, 5, 7, 4, 8, 8, 2, 12, 7, 3, 13, 6, 6, 11, 9, 4, 12, 12, 4, 13, 13, 3, 14, 14, 8, 17, 11, 7, 15, 15, 10, 14, 13, 7, 16, 18, 3, 22, 18, 7, 24, 14, 11, 20, 20, 14, 17, 18, 10, 22, 22, 8]

cp's OEIS Frontend

A363992 The number of ways 2n can be expressed as the sum of an odd prime number and an odd nonprime, both of which are relatively prime to n.

Table of values

List of values

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

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

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