A272143 - cp's OEIS frontend

A272143 For a given n, and any m less than n-1, the total number of primes of the form 2^n-2^m-1.

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

[0, 1, 1, 2, 2, 3, 0, 4, 4, 3, 1, 5, 1, 4, 0, 3, 2, 8, 1, 11, 4, 5, 0, 7, 1, 2, 0, 1, 5, 4, 0, 7, 5, 1, 1, 9, 0, 6, 0, 7, 1, 6, 0, 4, 7, 2, 1, 10, 3, 3, 1, 2, 1, 6, 0, 4, 3, 0, 1, 8, 3, 3, 0, 3, 1, 8, 1, 2, 2, 3, 0, 9, 1, 5, 2, 5, 8, 3, 0, 10]

cp's OEIS Frontend

A272143 For a given n, and any m less than n-1, the total number of primes of the form 2^n-2^m-1.

Table of values

List of values

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

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

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