A239730 - cp's OEIS frontend

A239730 Number of values of k such that 2^k - (6n+3) and (6n+3)*2^k + 1 are both prime, k < 6n+3.

n	a(n)
0	0
1	0
2	1
3	3
4	5
5	3
6	1
7	3
8	1
9	5
10	2
11	1
12	3
13	2
14	1
15	1
16	2
17	5
18	0
19	3
20	0
21	1
22	3
23	2
24	3
25	2
26	1
27	5
28	1
29	1
30	0
31	0
32	4
33	1
34	2
35	2
36	2
37	2
38	4
39	1
40	3
41	1
42	1
43	3
44	1
45	4
46	0
47	1
48	0
49	2
50	1
51	0
52	3
53	0
54	1
55	2
56	1
57	3
58	1
59	3
60	1
61	1
62	4
63	2
64	1
65	1
66	1
67	4
68	2
69	2
70	4
71	3
72	1
73	1
74	3
75	4
76	6
77	4
78	1
79	1
80	1
81	1
82	1
83	1
84	0
85	5
86	0
87	2
88	2
89	2
90	1
91	1
92	2
93	1
94	1
95	0
96	1
97	1
98	0
99	2
100	1
101	0

[0, 0, 1, 3, 5, 3, 1, 3, 1, 5, 2, 1, 3, 2, 1, 1, 2, 5, 0, 3, 0, 1, 3, 2, 3, 2, 1, 5, 1, 1, 0, 0, 4, 1, 2, 2, 2, 2, 4, 1, 3, 1, 1, 3, 1, 4, 0, 1, 0, 2, 1, 0, 3, 0, 1, 2, 1, 3, 1, 3, 1, 1, 4, 2, 1, 1, 1, 4, 2, 2, 4, 3, 1, 1, 3, 4, 6, 4, 1, 1, 1, 1, 1, 1, 0, 5, 0, 2, 2, 2, 1, 1, 2, 1, 1, 0, 1, 1, 0, 2, 1, 0]

cp's OEIS Frontend

A239730 Number of values of k such that 2^k - (6n+3) and (6n+3)*2^k + 1 are both prime, k < 6n+3.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	3
4	5
5	3
6	1
7	3
8	1
9	5
10	2
11	1
12	3
13	2
14	1
15	1
16	2
17	5
18	0
19	3
20	0
21	1
22	3
23	2
24	3
25	2
26	1
27	5
28	1
29	1
30	0
31	0
32	4
33	1
34	2
35	2
36	2
37	2
38	4
39	1
40	3
41	1
42	1
43	3
44	1
45	4
46	0
47	1
48	0
49	2
50	1
51	0
52	3
53	0
54	1
55	2
56	1
57	3
58	1
59	3
60	1
61	1
62	4
63	2
64	1
65	1
66	1
67	4
68	2
69	2
70	4
71	3
72	1
73	1
74	3
75	4
76	6
77	4
78	1
79	1
80	1
81	1
82	1
83	1
84	0
85	5
86	0
87	2
88	2
89	2
90	1
91	1
92	2
93	1
94	1
95	0
96	1
97	1
98	0
99	2
100	1
101	0

n	a(n)
0	0
1	0
2	1
3	3
4	5
5	3
6	1
7	3
8	1
9	5
10	2
11	1
12	3
13	2
14	1
15	1
16	2
17	5
18	0
19	3
20	0
21	1
22	3
23	2
24	3
25	2
26	1
27	5
28	1
29	1
30	0
31	0
32	4
33	1
34	2
35	2
36	2
37	2
38	4
39	1
40	3
41	1
42	1
43	3
44	1
45	4
46	0
47	1
48	0
49	2
50	1
51	0
52	3
53	0
54	1
55	2
56	1
57	3
58	1
59	3
60	1
61	1
62	4
63	2
64	1
65	1
66	1
67	4
68	2
69	2
70	4
71	3
72	1
73	1
74	3
75	4
76	6
77	4
78	1
79	1
80	1
81	1
82	1
83	1
84	0
85	5
86	0
87	2
88	2
89	2
90	1
91	1
92	2
93	1
94	1
95	0
96	1
97	1
98	0
99	2
100	1
101	0

n	a(n)
0	0
1	0
2	1
3	3
4	5
5	3
6	1
7	3
8	1
9	5
10	2
11	1
12	3
13	2
14	1
15	1
16	2
17	5
18	0
19	3
20	0
21	1
22	3
23	2
24	3
25	2
26	1
27	5
28	1
29	1
30	0
31	0
32	4
33	1
34	2
35	2
36	2
37	2
38	4
39	1
40	3
41	1
42	1
43	3
44	1
45	4
46	0
47	1
48	0
49	2
50	1
51	0
52	3
53	0
54	1
55	2
56	1
57	3
58	1
59	3
60	1
61	1
62	4
63	2
64	1
65	1
66	1
67	4
68	2
69	2
70	4
71	3
72	1
73	1
74	3
75	4
76	6
77	4
78	1
79	1
80	1
81	1
82	1
83	1
84	0
85	5
86	0
87	2
88	2
89	2
90	1
91	1
92	2
93	1
94	1
95	0
96	1
97	1
98	0
99	2
100	1
101	0