A103514 - cp's OEIS frontend

A103514 a(n) is the smallest m such that primorial(n)/2 - 2^m is prime.

n	a(n)
2	0
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	3
11	1
12	2
13	1
14	25
15	2
16	1
17	6
18	6
19	19
20	1
21	13
22	3
23	3
24	11
25	29
26	2
27	1
28	6
29	3
30	4
31	2
32	6
33	4
34	15
35	6
36	4
37	20
38	4
39	1
40	7
41	16
42	4
43	7
44	22
45	3
46	12
47	13
48	9
49	35
50	2
51	3
52	3
53	52
54	35
55	3
56	32
57	15
58	13
59	10
60	53
61	56
62	9
63	16
64	36
65	5
66	8
67	5
68	22
69	3
70	14
71	2
72	64
73	37
74	8
75	22
76	42
77	11
78	22
79	22
80	12
81	11
82	26
83	1
84	54
85	187
86	20
87	9

[0, 1, 1, 1, 1, 1, 1, 1, 3, 1, 2, 1, 25, 2, 1, 6, 6, 19, 1, 13, 3, 3, 11, 29, 2, 1, 6, 3, 4, 2, 6, 4, 15, 6, 4, 20, 4, 1, 7, 16, 4, 7, 22, 3, 12, 13, 9, 35, 2, 3, 3, 52, 35, 3, 32, 15, 13, 10, 53, 56, 9, 16, 36, 5, 8, 5, 22, 3, 14, 2, 64, 37, 8, 22, 42, 11, 22, 22, 12, 11, 26, 1, 54, 187, 20, 9]

cp's OEIS Frontend

A103514 a(n) is the smallest m such that primorial(n)/2 - 2^m is prime.

Table of values

List of values

n	a(n)
2	0
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	3
11	1
12	2
13	1
14	25
15	2
16	1
17	6
18	6
19	19
20	1
21	13
22	3
23	3
24	11
25	29
26	2
27	1
28	6
29	3
30	4
31	2
32	6
33	4
34	15
35	6
36	4
37	20
38	4
39	1
40	7
41	16
42	4
43	7
44	22
45	3
46	12
47	13
48	9
49	35
50	2
51	3
52	3
53	52
54	35
55	3
56	32
57	15
58	13
59	10
60	53
61	56
62	9
63	16
64	36
65	5
66	8
67	5
68	22
69	3
70	14
71	2
72	64
73	37
74	8
75	22
76	42
77	11
78	22
79	22
80	12
81	11
82	26
83	1
84	54
85	187
86	20
87	9

n	a(n)
2	0
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	3
11	1
12	2
13	1
14	25
15	2
16	1
17	6
18	6
19	19
20	1
21	13
22	3
23	3
24	11
25	29
26	2
27	1
28	6
29	3
30	4
31	2
32	6
33	4
34	15
35	6
36	4
37	20
38	4
39	1
40	7
41	16
42	4
43	7
44	22
45	3
46	12
47	13
48	9
49	35
50	2
51	3
52	3
53	52
54	35
55	3
56	32
57	15
58	13
59	10
60	53
61	56
62	9
63	16
64	36
65	5
66	8
67	5
68	22
69	3
70	14
71	2
72	64
73	37
74	8
75	22
76	42
77	11
78	22
79	22
80	12
81	11
82	26
83	1
84	54
85	187
86	20
87	9

n	a(n)
2	0
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	3
11	1
12	2
13	1
14	25
15	2
16	1
17	6
18	6
19	19
20	1
21	13
22	3
23	3
24	11
25	29
26	2
27	1
28	6
29	3
30	4
31	2
32	6
33	4
34	15
35	6
36	4
37	20
38	4
39	1
40	7
41	16
42	4
43	7
44	22
45	3
46	12
47	13
48	9
49	35
50	2
51	3
52	3
53	52
54	35
55	3
56	32
57	15
58	13
59	10
60	53
61	56
62	9
63	16
64	36
65	5
66	8
67	5
68	22
69	3
70	14
71	2
72	64
73	37
74	8
75	22
76	42
77	11
78	22
79	22
80	12
81	11
82	26
83	1
84	54
85	187
86	20
87	9