A057217 - cp's OEIS frontend

A057217 a(n) = smallest positive integer k such that 1 + n*k! is a prime.

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	3
8	2
9	2
10	1
11	2
12	1
13	3
14	2
15	2
16	1
17	3
18	1
19	4
20	2
21	2
22	1
23	2
24	4
25	3
26	2
27	3
28	1
29	2
30	1
31	7
32	3
33	2
34	6
35	2
36	1
37	3
38	3
39	2
40	1
41	2
42	1
43	4
44	2
45	3
46	1
47	3
48	2
49	5
50	2
51	2
52	1
53	2
54	2
55	3
56	2
57	5
58	1
59	11
60	1
61	3
62	3
63	2
64	5
65	2
66	1
67	4
68	2
69	2
70	1
71	5
72	1
73	3
74	2
75	2
76	3
77	3
78	1
79	14
80	5
81	2
82	1
83	2
84	4
85	7
86	2
87	3
88	1
89	2
90	2
91	3
92	8
93	5
94	7
95	2
96	1
97	11
98	2
99	2
100	1
101	3
102	1
103	3

[1, 1, 2, 1, 2, 1, 3, 2, 2, 1, 2, 1, 3, 2, 2, 1, 3, 1, 4, 2, 2, 1, 2, 4, 3, 2, 3, 1, 2, 1, 7, 3, 2, 6, 2, 1, 3, 3, 2, 1, 2, 1, 4, 2, 3, 1, 3, 2, 5, 2, 2, 1, 2, 2, 3, 2, 5, 1, 11, 1, 3, 3, 2, 5, 2, 1, 4, 2, 2, 1, 5, 1, 3, 2, 2, 3, 3, 1, 14, 5, 2, 1, 2, 4, 7, 2, 3, 1, 2, 2, 3, 8, 5, 7, 2, 1, 11, 2, 2, 1, 3, 1, 3]

cp's OEIS Frontend

A057217 a(n) = smallest positive integer k such that 1 + n*k! is a prime.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	3
8	2
9	2
10	1
11	2
12	1
13	3
14	2
15	2
16	1
17	3
18	1
19	4
20	2
21	2
22	1
23	2
24	4
25	3
26	2
27	3
28	1
29	2
30	1
31	7
32	3
33	2
34	6
35	2
36	1
37	3
38	3
39	2
40	1
41	2
42	1
43	4
44	2
45	3
46	1
47	3
48	2
49	5
50	2
51	2
52	1
53	2
54	2
55	3
56	2
57	5
58	1
59	11
60	1
61	3
62	3
63	2
64	5
65	2
66	1
67	4
68	2
69	2
70	1
71	5
72	1
73	3
74	2
75	2
76	3
77	3
78	1
79	14
80	5
81	2
82	1
83	2
84	4
85	7
86	2
87	3
88	1
89	2
90	2
91	3
92	8
93	5
94	7
95	2
96	1
97	11
98	2
99	2
100	1
101	3
102	1
103	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	3
8	2
9	2
10	1
11	2
12	1
13	3
14	2
15	2
16	1
17	3
18	1
19	4
20	2
21	2
22	1
23	2
24	4
25	3
26	2
27	3
28	1
29	2
30	1
31	7
32	3
33	2
34	6
35	2
36	1
37	3
38	3
39	2
40	1
41	2
42	1
43	4
44	2
45	3
46	1
47	3
48	2
49	5
50	2
51	2
52	1
53	2
54	2
55	3
56	2
57	5
58	1
59	11
60	1
61	3
62	3
63	2
64	5
65	2
66	1
67	4
68	2
69	2
70	1
71	5
72	1
73	3
74	2
75	2
76	3
77	3
78	1
79	14
80	5
81	2
82	1
83	2
84	4
85	7
86	2
87	3
88	1
89	2
90	2
91	3
92	8
93	5
94	7
95	2
96	1
97	11
98	2
99	2
100	1
101	3
102	1
103	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	1
7	3
8	2
9	2
10	1
11	2
12	1
13	3
14	2
15	2
16	1
17	3
18	1
19	4
20	2
21	2
22	1
23	2
24	4
25	3
26	2
27	3
28	1
29	2
30	1
31	7
32	3
33	2
34	6
35	2
36	1
37	3
38	3
39	2
40	1
41	2
42	1
43	4
44	2
45	3
46	1
47	3
48	2
49	5
50	2
51	2
52	1
53	2
54	2
55	3
56	2
57	5
58	1
59	11
60	1
61	3
62	3
63	2
64	5
65	2
66	1
67	4
68	2
69	2
70	1
71	5
72	1
73	3
74	2
75	2
76	3
77	3
78	1
79	14
80	5
81	2
82	1
83	2
84	4
85	7
86	2
87	3
88	1
89	2
90	2
91	3
92	8
93	5
94	7
95	2
96	1
97	11
98	2
99	2
100	1
101	3
102	1
103	3