A075758 - cp's OEIS frontend

A075758 Smallest k such that n!+k!-1 is prime, or 0 if no such k exists.

n	a(n)
1	2
2	1
3	2
4	3
5	5
6	4
7	7
8	4
9	4
10	6
11	2
12	8
13	14
14	8
15	8
16	4
17	17
18	7
19	26
20	7
21	6
22	12
23	6
24	14
25	14
26	16
27	2
28	27
29	6
30	33
31	6
32	36
33	26
34	7
35	33
36	18
37	2
38	18
39	6
40	36
41	2
42	18
43	14
44	20
45	25
46	14
47	25
48	0
49	22
50	24
51	34
52	16
53	46
54	61
55	18
56	7
57	25
58	38
59	47
60	47
61	54
62	79
63	157
64	97
65	28
66	23
67	7
68	137
69	24
70	46
71	36
72	25
73	2
74	214
75	94
76	40
77	2
78	96

[2, 1, 2, 3, 5, 4, 7, 4, 4, 6, 2, 8, 14, 8, 8, 4, 17, 7, 26, 7, 6, 12, 6, 14, 14, 16, 2, 27, 6, 33, 6, 36, 26, 7, 33, 18, 2, 18, 6, 36, 2, 18, 14, 20, 25, 14, 25, 0, 22, 24, 34, 16, 46, 61, 18, 7, 25, 38, 47, 47, 54, 79, 157, 97, 28, 23, 7, 137, 24, 46, 36, 25, 2, 214, 94, 40, 2, 96]

cp's OEIS Frontend

A075758 Smallest k such that n!+k!-1 is prime, or 0 if no such k exists.

Table of values

List of values

n	a(n)
1	2
2	1
3	2
4	3
5	5
6	4
7	7
8	4
9	4
10	6
11	2
12	8
13	14
14	8
15	8
16	4
17	17
18	7
19	26
20	7
21	6
22	12
23	6
24	14
25	14
26	16
27	2
28	27
29	6
30	33
31	6
32	36
33	26
34	7
35	33
36	18
37	2
38	18
39	6
40	36
41	2
42	18
43	14
44	20
45	25
46	14
47	25
48	0
49	22
50	24
51	34
52	16
53	46
54	61
55	18
56	7
57	25
58	38
59	47
60	47
61	54
62	79
63	157
64	97
65	28
66	23
67	7
68	137
69	24
70	46
71	36
72	25
73	2
74	214
75	94
76	40
77	2
78	96

n	a(n)
1	2
2	1
3	2
4	3
5	5
6	4
7	7
8	4
9	4
10	6
11	2
12	8
13	14
14	8
15	8
16	4
17	17
18	7
19	26
20	7
21	6
22	12
23	6
24	14
25	14
26	16
27	2
28	27
29	6
30	33
31	6
32	36
33	26
34	7
35	33
36	18
37	2
38	18
39	6
40	36
41	2
42	18
43	14
44	20
45	25
46	14
47	25
48	0
49	22
50	24
51	34
52	16
53	46
54	61
55	18
56	7
57	25
58	38
59	47
60	47
61	54
62	79
63	157
64	97
65	28
66	23
67	7
68	137
69	24
70	46
71	36
72	25
73	2
74	214
75	94
76	40
77	2
78	96

n	a(n)
1	2
2	1
3	2
4	3
5	5
6	4
7	7
8	4
9	4
10	6
11	2
12	8
13	14
14	8
15	8
16	4
17	17
18	7
19	26
20	7
21	6
22	12
23	6
24	14
25	14
26	16
27	2
28	27
29	6
30	33
31	6
32	36
33	26
34	7
35	33
36	18
37	2
38	18
39	6
40	36
41	2
42	18
43	14
44	20
45	25
46	14
47	25
48	0
49	22
50	24
51	34
52	16
53	46
54	61
55	18
56	7
57	25
58	38
59	47
60	47
61	54
62	79
63	157
64	97
65	28
66	23
67	7
68	137
69	24
70	46
71	36
72	25
73	2
74	214
75	94
76	40
77	2
78	96