A247044 - cp's OEIS frontend

A247044 Least number k > 0 such that k!*n! - 1 is prime.

n	a(n)
1	3
2	2
3	1
4	1
5	2
6	1
7	1
8	3
9	6
10	7
11	14
12	1
13	8
14	1
15	2
16	4
17	2
18	5
19	16
20	26
21	27
22	2
23	18
24	29
25	9
26	15
27	7
28	2
29	24
30	1
31	44
32	1
33	1
34	209
35	12
36	128
37	20
38	1
39	18
40	5
41	6
42	3
43	21
44	5
45	42
46	6
47	45
48	19
49	14
50	10
51	8
52	20
53	72
54	8
55	226
56	11
57	5
58	77
59	99
60	28
61	16
62	15
63	157
64	9
65	24
66	17
67	110
68	9
69	28
70	26
71	16
72	37
73	163
74	79
75	29
76	45
77	58
78	21
79	66

[3, 2, 1, 1, 2, 1, 1, 3, 6, 7, 14, 1, 8, 1, 2, 4, 2, 5, 16, 26, 27, 2, 18, 29, 9, 15, 7, 2, 24, 1, 44, 1, 1, 209, 12, 128, 20, 1, 18, 5, 6, 3, 21, 5, 42, 6, 45, 19, 14, 10, 8, 20, 72, 8, 226, 11, 5, 77, 99, 28, 16, 15, 157, 9, 24, 17, 110, 9, 28, 26, 16, 37, 163, 79, 29, 45, 58, 21, 66]

cp's OEIS Frontend

A247044 Least number k > 0 such that k!*n! - 1 is prime.

Table of values

List of values

n	a(n)
1	3
2	2
3	1
4	1
5	2
6	1
7	1
8	3
9	6
10	7
11	14
12	1
13	8
14	1
15	2
16	4
17	2
18	5
19	16
20	26
21	27
22	2
23	18
24	29
25	9
26	15
27	7
28	2
29	24
30	1
31	44
32	1
33	1
34	209
35	12
36	128
37	20
38	1
39	18
40	5
41	6
42	3
43	21
44	5
45	42
46	6
47	45
48	19
49	14
50	10
51	8
52	20
53	72
54	8
55	226
56	11
57	5
58	77
59	99
60	28
61	16
62	15
63	157
64	9
65	24
66	17
67	110
68	9
69	28
70	26
71	16
72	37
73	163
74	79
75	29
76	45
77	58
78	21
79	66

n	a(n)
1	3
2	2
3	1
4	1
5	2
6	1
7	1
8	3
9	6
10	7
11	14
12	1
13	8
14	1
15	2
16	4
17	2
18	5
19	16
20	26
21	27
22	2
23	18
24	29
25	9
26	15
27	7
28	2
29	24
30	1
31	44
32	1
33	1
34	209
35	12
36	128
37	20
38	1
39	18
40	5
41	6
42	3
43	21
44	5
45	42
46	6
47	45
48	19
49	14
50	10
51	8
52	20
53	72
54	8
55	226
56	11
57	5
58	77
59	99
60	28
61	16
62	15
63	157
64	9
65	24
66	17
67	110
68	9
69	28
70	26
71	16
72	37
73	163
74	79
75	29
76	45
77	58
78	21
79	66

n	a(n)
1	3
2	2
3	1
4	1
5	2
6	1
7	1
8	3
9	6
10	7
11	14
12	1
13	8
14	1
15	2
16	4
17	2
18	5
19	16
20	26
21	27
22	2
23	18
24	29
25	9
26	15
27	7
28	2
29	24
30	1
31	44
32	1
33	1
34	209
35	12
36	128
37	20
38	1
39	18
40	5
41	6
42	3
43	21
44	5
45	42
46	6
47	45
48	19
49	14
50	10
51	8
52	20
53	72
54	8
55	226
56	11
57	5
58	77
59	99
60	28
61	16
62	15
63	157
64	9
65	24
66	17
67	110
68	9
69	28
70	26
71	16
72	37
73	163
74	79
75	29
76	45
77	58
78	21
79	66