A109925 - cp's OEIS frontend

A109925 Number of primes of the form n - 2^k.

n	a(n)
1	0
2	0
3	1
4	2
5	1
6	2
7	2
8	1
9	2
10	1
11	2
12	1
13	2
14	1
15	3
16	0
17	1
18	2
19	3
20	1
21	4
22	0
23	2
24	1
25	2
26	0
27	3
28	0
29	1
30	1
31	2
32	1
33	3
34	1
35	3
36	0
37	2
38	1
39	4
40	0
41	1
42	1
43	2
44	1
45	5
46	0
47	2
48	1
49	3
50	0
51	3
52	0
53	1
54	1
55	3
56	0
57	2
58	0
59	1
60	1
61	3
62	1
63	4
64	0
65	1
66	1
67	2
68	1
69	5
70	0
71	2
72	1
73	2
74	1
75	6
76	0
77	3
78	0
79	2
80	1
81	3
82	0
83	3
84	1
85	2
86	0
87	4
88	0
89	1
90	1
91	3
92	0
93	3
94	0
95	2
96	0
97	1
98	1
99	3
100	0
101	2
102	1
103	2
104	1
105	6

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

cp's OEIS Frontend

A109925 Number of primes of the form n - 2^k.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	2
5	1
6	2
7	2
8	1
9	2
10	1
11	2
12	1
13	2
14	1
15	3
16	0
17	1
18	2
19	3
20	1
21	4
22	0
23	2
24	1
25	2
26	0
27	3
28	0
29	1
30	1
31	2
32	1
33	3
34	1
35	3
36	0
37	2
38	1
39	4
40	0
41	1
42	1
43	2
44	1
45	5
46	0
47	2
48	1
49	3
50	0
51	3
52	0
53	1
54	1
55	3
56	0
57	2
58	0
59	1
60	1
61	3
62	1
63	4
64	0
65	1
66	1
67	2
68	1
69	5
70	0
71	2
72	1
73	2
74	1
75	6
76	0
77	3
78	0
79	2
80	1
81	3
82	0
83	3
84	1
85	2
86	0
87	4
88	0
89	1
90	1
91	3
92	0
93	3
94	0
95	2
96	0
97	1
98	1
99	3
100	0
101	2
102	1
103	2
104	1
105	6

n	a(n)
1	0
2	0
3	1
4	2
5	1
6	2
7	2
8	1
9	2
10	1
11	2
12	1
13	2
14	1
15	3
16	0
17	1
18	2
19	3
20	1
21	4
22	0
23	2
24	1
25	2
26	0
27	3
28	0
29	1
30	1
31	2
32	1
33	3
34	1
35	3
36	0
37	2
38	1
39	4
40	0
41	1
42	1
43	2
44	1
45	5
46	0
47	2
48	1
49	3
50	0
51	3
52	0
53	1
54	1
55	3
56	0
57	2
58	0
59	1
60	1
61	3
62	1
63	4
64	0
65	1
66	1
67	2
68	1
69	5
70	0
71	2
72	1
73	2
74	1
75	6
76	0
77	3
78	0
79	2
80	1
81	3
82	0
83	3
84	1
85	2
86	0
87	4
88	0
89	1
90	1
91	3
92	0
93	3
94	0
95	2
96	0
97	1
98	1
99	3
100	0
101	2
102	1
103	2
104	1
105	6

n	a(n)
1	0
2	0
3	1
4	2
5	1
6	2
7	2
8	1
9	2
10	1
11	2
12	1
13	2
14	1
15	3
16	0
17	1
18	2
19	3
20	1
21	4
22	0
23	2
24	1
25	2
26	0
27	3
28	0
29	1
30	1
31	2
32	1
33	3
34	1
35	3
36	0
37	2
38	1
39	4
40	0
41	1
42	1
43	2
44	1
45	5
46	0
47	2
48	1
49	3
50	0
51	3
52	0
53	1
54	1
55	3
56	0
57	2
58	0
59	1
60	1
61	3
62	1
63	4
64	0
65	1
66	1
67	2
68	1
69	5
70	0
71	2
72	1
73	2
74	1
75	6
76	0
77	3
78	0
79	2
80	1
81	3
82	0
83	3
84	1
85	2
86	0
87	4
88	0
89	1
90	1
91	3
92	0
93	3
94	0
95	2
96	0
97	1
98	1
99	3
100	0
101	2
102	1
103	2
104	1
105	6