A078687 - cp's OEIS frontend

A078687 Number of x>=0 such that prime(n)-2^x is prime.

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

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

cp's OEIS Frontend

A078687 Number of x>=0 such that prime(n)-2^x is prime.

Table of values

List of values

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

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

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