A141099 - cp's OEIS frontend

A141099 Number of unordered pairs of odd nonprime numbers that sum to 2n.

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

[1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 2, 0, 2, 3, 0, 2, 3, 1, 2, 3, 3, 2, 4, 2, 3, 5, 1, 4, 6, 1, 5, 5, 3, 4, 7, 3, 4, 7, 4, 4, 9, 4, 5, 8, 4, 7, 9, 5, 6, 8, 6, 7, 10, 6, 6, 13, 5, 7, 13, 5, 10, 11, 8, 8, 11, 9, 10, 14, 9, 9, 16, 7, 12, 15, 8, 12, 15, 9, 10, 17, 14, 11, 16, 12, 12, 19, 11, 13, 19]

cp's OEIS Frontend

A141099 Number of unordered pairs of odd nonprime numbers that sum to 2n.

Table of values

List of values

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

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

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