A238735 - cp's OEIS frontend

A238735 Number of prime pairs {2^n + (2k + 1), (2k + 1)*2^n + 1}, k < n.

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

[1, 2, 1, 2, 0, 3, 2, 2, 0, 1, 0, 2, 0, 0, 0, 3, 0, 1, 0, 3, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A238735 Number of prime pairs {2^n + (2k + 1), (2k + 1)*2^n + 1}, k < n.

Table of values

List of values

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

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

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