A206762 - cp's OEIS frontend

A206762 a(n) is the least number from 1,2,...,n-1, such that n!/a(n)+1 is prime, and a(n)=0, if such number does not exist.

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

[1, 1, 2, 2, 3, 2, 2, 5, 6, 1, 8, 2, 5, 7, 2, 3, 0, 5, 8, 4, 16, 3, 8, 4, 10, 1, 13, 8, 2, 19, 4, 11, 11, 7, 3, 1, 12, 13, 4, 1, 24, 2, 8, 5, 9, 25, 16, 2, 12, 0, 26, 0, 17, 22, 44, 22, 37, 7, 48, 4, 37, 18, 7, 39, 16, 19, 7, 15, 19, 36, 30, 1, 14, 15, 16, 1]

cp's OEIS Frontend

A206762 a(n) is the least number from 1,2,...,n-1, such that n!/a(n)+1 is prime, and a(n)=0, if such number does not exist.

Table of values

List of values

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

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

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