A254690 - cp's OEIS frontend

A254690 Number of decompositions of 2n into a sum of two primes p1 < p2 such that p2-p1 is between a pair of sexy primes.

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

[0, 0, 0, 0, 0, 0, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 1, 3, 3, 2, 3, 5, 4, 2, 5, 2, 3, 5, 2, 4, 6, 2, 5, 6, 3, 4, 6, 4, 3, 7, 2, 3, 8, 3, 4, 6, 2, 5, 7, 3, 3, 7, 5, 5, 8, 4, 3, 9, 2, 4, 8, 2, 5, 7, 2, 2, 4, 6, 5, 7, 4, 2, 10, 2, 4, 7, 1, 6, 7, 1, 4, 10, 7, 3, 8]

cp's OEIS Frontend

A254690 Number of decompositions of 2n into a sum of two primes p1 < p2 such that p2-p1 is between a pair of sexy primes.

Table of values

List of values

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

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

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