A230261 - cp's OEIS frontend

A230261 Number of ways to write 2*n - 1 = p + q with p, p + 6 and q^4 + 1 all prime, where q is a positive integer.

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

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

cp's OEIS Frontend

A230261 Number of ways to write 2*n - 1 = p + q with p, p + 6 and q^4 + 1 all prime, where q is a positive integer.

Table of values

List of values

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

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

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