A212637 - cp's OEIS frontend

A212637 Minimal m>=0 such that (2*n-1)!! + 2^m is prime.

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	4
8	3
9	2
10	6
11	1
12	1
13	3
14	1
15	2
16	7
17	5
18	11
19	16
20	2
21	3
22	2
23	4
24	4
25	11
26	6
27	4
28	33
29	1
30	12
31	18
32	3
33	20
34	5
35	38
36	17
37	2
38	1
39	18
40	3
41	14
42	26
43	11
44	14
45	63
46	3
47	2
48	13
49	110
50	44
51	34
52	1
53	22
54	44
55	114
56	37
57	43
58	39
59	5
60	13
61	12
62	57
63	41
64	12
65	18
66	13
67	9
68	8
69	13
70	52
71	26
72	78
73	37
74	14

[0, 1, 1, 1, 1, 2, 4, 3, 2, 6, 1, 1, 3, 1, 2, 7, 5, 11, 16, 2, 3, 2, 4, 4, 11, 6, 4, 33, 1, 12, 18, 3, 20, 5, 38, 17, 2, 1, 18, 3, 14, 26, 11, 14, 63, 3, 2, 13, 110, 44, 34, 1, 22, 44, 114, 37, 43, 39, 5, 13, 12, 57, 41, 12, 18, 13, 9, 8, 13, 52, 26, 78, 37, 14]

cp's OEIS Frontend

A212637 Minimal m>=0 such that (2*n-1)!! + 2^m is prime.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	4
8	3
9	2
10	6
11	1
12	1
13	3
14	1
15	2
16	7
17	5
18	11
19	16
20	2
21	3
22	2
23	4
24	4
25	11
26	6
27	4
28	33
29	1
30	12
31	18
32	3
33	20
34	5
35	38
36	17
37	2
38	1
39	18
40	3
41	14
42	26
43	11
44	14
45	63
46	3
47	2
48	13
49	110
50	44
51	34
52	1
53	22
54	44
55	114
56	37
57	43
58	39
59	5
60	13
61	12
62	57
63	41
64	12
65	18
66	13
67	9
68	8
69	13
70	52
71	26
72	78
73	37
74	14

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	4
8	3
9	2
10	6
11	1
12	1
13	3
14	1
15	2
16	7
17	5
18	11
19	16
20	2
21	3
22	2
23	4
24	4
25	11
26	6
27	4
28	33
29	1
30	12
31	18
32	3
33	20
34	5
35	38
36	17
37	2
38	1
39	18
40	3
41	14
42	26
43	11
44	14
45	63
46	3
47	2
48	13
49	110
50	44
51	34
52	1
53	22
54	44
55	114
56	37
57	43
58	39
59	5
60	13
61	12
62	57
63	41
64	12
65	18
66	13
67	9
68	8
69	13
70	52
71	26
72	78
73	37
74	14

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	4
8	3
9	2
10	6
11	1
12	1
13	3
14	1
15	2
16	7
17	5
18	11
19	16
20	2
21	3
22	2
23	4
24	4
25	11
26	6
27	4
28	33
29	1
30	12
31	18
32	3
33	20
34	5
35	38
36	17
37	2
38	1
39	18
40	3
41	14
42	26
43	11
44	14
45	63
46	3
47	2
48	13
49	110
50	44
51	34
52	1
53	22
54	44
55	114
56	37
57	43
58	39
59	5
60	13
61	12
62	57
63	41
64	12
65	18
66	13
67	9
68	8
69	13
70	52
71	26
72	78
73	37
74	14