A230252 - cp's OEIS frontend

A230252 Number of ways to write n = x + y (x, y > 0) with 2*x + 1, x^2 + x + 1 and y^2 + y + 1 all prime.

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

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

cp's OEIS Frontend

A230252 Number of ways to write n = x + y (x, y > 0) with 2*x + 1, x^2 + x + 1 and y^2 + y + 1 all prime.

Table of values

List of values

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

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

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