A175193 - cp's OEIS frontend

A175193 a(n) is the smallest positive integer such that (the n-th prime)+a(n)! is prime, or -1 if no such prime exists.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	2
11	3
12	3
13	2
14	4
15	3
16	3
17	2
18	3
19	3
20	2
21	3
22	4
23	3
24	4
25	3
26	2
27	3
28	2
29	5
30	4
31	4
32	3
33	2
34	4
35	2
36	3
37	3
38	5
39	3
40	3
41	2
42	9
43	2
44	3
45	2
46	4
47	5
48	3
49	2
50	5
51	3
52	2
53	7
54	3
55	3
56	3
57	2
58	3
59	3
60	2
61	4
62	4
63	3
64	2
65	4
66	8
67	3
68	5
69	2
70	4
71	3
72	4
73	3
74	3
75	5
76	3
77	5
78	4
79	5
80	4
81	2
82	5
83	2
84	3
85	4
86	3
87	5
88	3
89	2
90	4
91	4
92	4
93	5
94	7
95	4
96	3
97	6
98	2
99	4
100	3
101	4
102	3
103	3
104	2
105	3

[1, 2, 2, 3, 2, 3, 2, 4, 3, 2, 3, 3, 2, 4, 3, 3, 2, 3, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 5, 4, 4, 3, 2, 4, 2, 3, 3, 5, 3, 3, 2, 9, 2, 3, 2, 4, 5, 3, 2, 5, 3, 2, 7, 3, 3, 3, 2, 3, 3, 2, 4, 4, 3, 2, 4, 8, 3, 5, 2, 4, 3, 4, 3, 3, 5, 3, 5, 4, 5, 4, 2, 5, 2, 3, 4, 3, 5, 3, 2, 4, 4, 4, 5, 7, 4, 3, 6, 2, 4, 3, 4, 3, 3, 2, 3]

cp's OEIS Frontend

A175193 a(n) is the smallest positive integer such that (the n-th prime)+a(n)! is prime, or -1 if no such prime exists.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	2
11	3
12	3
13	2
14	4
15	3
16	3
17	2
18	3
19	3
20	2
21	3
22	4
23	3
24	4
25	3
26	2
27	3
28	2
29	5
30	4
31	4
32	3
33	2
34	4
35	2
36	3
37	3
38	5
39	3
40	3
41	2
42	9
43	2
44	3
45	2
46	4
47	5
48	3
49	2
50	5
51	3
52	2
53	7
54	3
55	3
56	3
57	2
58	3
59	3
60	2
61	4
62	4
63	3
64	2
65	4
66	8
67	3
68	5
69	2
70	4
71	3
72	4
73	3
74	3
75	5
76	3
77	5
78	4
79	5
80	4
81	2
82	5
83	2
84	3
85	4
86	3
87	5
88	3
89	2
90	4
91	4
92	4
93	5
94	7
95	4
96	3
97	6
98	2
99	4
100	3
101	4
102	3
103	3
104	2
105	3

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	2
11	3
12	3
13	2
14	4
15	3
16	3
17	2
18	3
19	3
20	2
21	3
22	4
23	3
24	4
25	3
26	2
27	3
28	2
29	5
30	4
31	4
32	3
33	2
34	4
35	2
36	3
37	3
38	5
39	3
40	3
41	2
42	9
43	2
44	3
45	2
46	4
47	5
48	3
49	2
50	5
51	3
52	2
53	7
54	3
55	3
56	3
57	2
58	3
59	3
60	2
61	4
62	4
63	3
64	2
65	4
66	8
67	3
68	5
69	2
70	4
71	3
72	4
73	3
74	3
75	5
76	3
77	5
78	4
79	5
80	4
81	2
82	5
83	2
84	3
85	4
86	3
87	5
88	3
89	2
90	4
91	4
92	4
93	5
94	7
95	4
96	3
97	6
98	2
99	4
100	3
101	4
102	3
103	3
104	2
105	3

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	2
8	4
9	3
10	2
11	3
12	3
13	2
14	4
15	3
16	3
17	2
18	3
19	3
20	2
21	3
22	4
23	3
24	4
25	3
26	2
27	3
28	2
29	5
30	4
31	4
32	3
33	2
34	4
35	2
36	3
37	3
38	5
39	3
40	3
41	2
42	9
43	2
44	3
45	2
46	4
47	5
48	3
49	2
50	5
51	3
52	2
53	7
54	3
55	3
56	3
57	2
58	3
59	3
60	2
61	4
62	4
63	3
64	2
65	4
66	8
67	3
68	5
69	2
70	4
71	3
72	4
73	3
74	3
75	5
76	3
77	5
78	4
79	5
80	4
81	2
82	5
83	2
84	3
85	4
86	3
87	5
88	3
89	2
90	4
91	4
92	4
93	5
94	7
95	4
96	3
97	6
98	2
99	4
100	3
101	4
102	3
103	3
104	2
105	3