A220455 - cp's OEIS frontend

A220455 Number of ways to write n=x+y (x>0, y>0) with 3x-2, 3x+2 and 2xy+1 all prime.

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	0
8	2
9	3
10	2
11	1
12	2
13	1
14	1
15	4
16	4
17	1
18	2
19	2
20	3
21	3
22	2
23	2
24	5
25	1
26	4
27	1
28	1
29	5
30	4
31	1
32	2
33	5
34	5
35	3
36	8
37	3
38	6
39	5
40	5
41	4
42	4
43	2
44	4
45	5
46	3
47	1
48	8
49	3
50	4
51	4
52	1
53	2
54	8
55	6
56	3
57	4
58	5
59	4
60	4
61	7
62	1
63	3
64	6
65	5
66	7
67	3
68	3
69	8
70	2
71	4
72	5
73	2
74	6
75	10
76	7
77	1
78	5
79	5
80	6
81	8
82	6
83	4
84	5
85	5
86	7
87	5
88	4
89	4
90	11
91	4
92	5
93	5
94	5
95	6
96	6
97	3
98	1
99	12
100	8

[0, 0, 0, 1, 1, 2, 0, 2, 3, 2, 1, 2, 1, 1, 4, 4, 1, 2, 2, 3, 3, 2, 2, 5, 1, 4, 1, 1, 5, 4, 1, 2, 5, 5, 3, 8, 3, 6, 5, 5, 4, 4, 2, 4, 5, 3, 1, 8, 3, 4, 4, 1, 2, 8, 6, 3, 4, 5, 4, 4, 7, 1, 3, 6, 5, 7, 3, 3, 8, 2, 4, 5, 2, 6, 10, 7, 1, 5, 5, 6, 8, 6, 4, 5, 5, 7, 5, 4, 4, 11, 4, 5, 5, 5, 6, 6, 3, 1, 12, 8]

cp's OEIS Frontend

A220455 Number of ways to write n=x+y (x>0, y>0) with 3x-2, 3x+2 and 2xy+1 all prime.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	0
8	2
9	3
10	2
11	1
12	2
13	1
14	1
15	4
16	4
17	1
18	2
19	2
20	3
21	3
22	2
23	2
24	5
25	1
26	4
27	1
28	1
29	5
30	4
31	1
32	2
33	5
34	5
35	3
36	8
37	3
38	6
39	5
40	5
41	4
42	4
43	2
44	4
45	5
46	3
47	1
48	8
49	3
50	4
51	4
52	1
53	2
54	8
55	6
56	3
57	4
58	5
59	4
60	4
61	7
62	1
63	3
64	6
65	5
66	7
67	3
68	3
69	8
70	2
71	4
72	5
73	2
74	6
75	10
76	7
77	1
78	5
79	5
80	6
81	8
82	6
83	4
84	5
85	5
86	7
87	5
88	4
89	4
90	11
91	4
92	5
93	5
94	5
95	6
96	6
97	3
98	1
99	12
100	8

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	0
8	2
9	3
10	2
11	1
12	2
13	1
14	1
15	4
16	4
17	1
18	2
19	2
20	3
21	3
22	2
23	2
24	5
25	1
26	4
27	1
28	1
29	5
30	4
31	1
32	2
33	5
34	5
35	3
36	8
37	3
38	6
39	5
40	5
41	4
42	4
43	2
44	4
45	5
46	3
47	1
48	8
49	3
50	4
51	4
52	1
53	2
54	8
55	6
56	3
57	4
58	5
59	4
60	4
61	7
62	1
63	3
64	6
65	5
66	7
67	3
68	3
69	8
70	2
71	4
72	5
73	2
74	6
75	10
76	7
77	1
78	5
79	5
80	6
81	8
82	6
83	4
84	5
85	5
86	7
87	5
88	4
89	4
90	11
91	4
92	5
93	5
94	5
95	6
96	6
97	3
98	1
99	12
100	8

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	0
8	2
9	3
10	2
11	1
12	2
13	1
14	1
15	4
16	4
17	1
18	2
19	2
20	3
21	3
22	2
23	2
24	5
25	1
26	4
27	1
28	1
29	5
30	4
31	1
32	2
33	5
34	5
35	3
36	8
37	3
38	6
39	5
40	5
41	4
42	4
43	2
44	4
45	5
46	3
47	1
48	8
49	3
50	4
51	4
52	1
53	2
54	8
55	6
56	3
57	4
58	5
59	4
60	4
61	7
62	1
63	3
64	6
65	5
66	7
67	3
68	3
69	8
70	2
71	4
72	5
73	2
74	6
75	10
76	7
77	1
78	5
79	5
80	6
81	8
82	6
83	4
84	5
85	5
86	7
87	5
88	4
89	4
90	11
91	4
92	5
93	5
94	5
95	6
96	6
97	3
98	1
99	12
100	8