A285486 - cp's OEIS frontend

A285486 a(n) is the smallest positive integer that makes a(n)*A007694(n)+1 a prime number, while a(n) and A007694(n) are coprimes.

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	13
10	11
11	1
12	5
13	5
14	7
15	1
16	1
17	1
18	5
19	7
20	1
21	1
22	11
23	1
24	7
25	5
26	7
27	1
28	1
29	23
30	1
31	11
32	1
33	19
34	5
35	13
36	1
37	1
38	1
39	5
40	5
41	5
42	29
43	19
44	1
45	1
46	5
47	1
48	1
49	37
50	5
51	5
52	17
53	11
54	13
55	25
56	13
57	5
58	41
59	7
60	1
61	5
62	1
63	25
64	7
65	5
66	7
67	1
68	1
69	5
70	11
71	11
72	5
73	5
74	5
75	5
76	11
77	5
78	1
79	11
80	7

[1, 1, 1, 1, 5, 1, 1, 1, 13, 11, 1, 5, 5, 7, 1, 1, 1, 5, 7, 1, 1, 11, 1, 7, 5, 7, 1, 1, 23, 1, 11, 1, 19, 5, 13, 1, 1, 1, 5, 5, 5, 29, 19, 1, 1, 5, 1, 1, 37, 5, 5, 17, 11, 13, 25, 13, 5, 41, 7, 1, 5, 1, 25, 7, 5, 7, 1, 1, 5, 11, 11, 5, 5, 5, 5, 11, 5, 1, 11, 7]

cp's OEIS Frontend

A285486 a(n) is the smallest positive integer that makes a(n)*A007694(n)+1 a prime number, while a(n) and A007694(n) are coprimes.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	13
10	11
11	1
12	5
13	5
14	7
15	1
16	1
17	1
18	5
19	7
20	1
21	1
22	11
23	1
24	7
25	5
26	7
27	1
28	1
29	23
30	1
31	11
32	1
33	19
34	5
35	13
36	1
37	1
38	1
39	5
40	5
41	5
42	29
43	19
44	1
45	1
46	5
47	1
48	1
49	37
50	5
51	5
52	17
53	11
54	13
55	25
56	13
57	5
58	41
59	7
60	1
61	5
62	1
63	25
64	7
65	5
66	7
67	1
68	1
69	5
70	11
71	11
72	5
73	5
74	5
75	5
76	11
77	5
78	1
79	11
80	7

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	13
10	11
11	1
12	5
13	5
14	7
15	1
16	1
17	1
18	5
19	7
20	1
21	1
22	11
23	1
24	7
25	5
26	7
27	1
28	1
29	23
30	1
31	11
32	1
33	19
34	5
35	13
36	1
37	1
38	1
39	5
40	5
41	5
42	29
43	19
44	1
45	1
46	5
47	1
48	1
49	37
50	5
51	5
52	17
53	11
54	13
55	25
56	13
57	5
58	41
59	7
60	1
61	5
62	1
63	25
64	7
65	5
66	7
67	1
68	1
69	5
70	11
71	11
72	5
73	5
74	5
75	5
76	11
77	5
78	1
79	11
80	7

n	a(n)
1	1
2	1
3	1
4	1
5	5
6	1
7	1
8	1
9	13
10	11
11	1
12	5
13	5
14	7
15	1
16	1
17	1
18	5
19	7
20	1
21	1
22	11
23	1
24	7
25	5
26	7
27	1
28	1
29	23
30	1
31	11
32	1
33	19
34	5
35	13
36	1
37	1
38	1
39	5
40	5
41	5
42	29
43	19
44	1
45	1
46	5
47	1
48	1
49	37
50	5
51	5
52	17
53	11
54	13
55	25
56	13
57	5
58	41
59	7
60	1
61	5
62	1
63	25
64	7
65	5
66	7
67	1
68	1
69	5
70	11
71	11
72	5
73	5
74	5
75	5
76	11
77	5
78	1
79	11
80	7