A193807 - cp's OEIS frontend

A193807 Smallest positive integer k such that n*k^2 + 1 is a prime.

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

[1, 1, 2, 1, 6, 1, 2, 3, 2, 1, 6, 1, 2, 3, 2, 1, 6, 1, 8, 3, 4, 1, 6, 2, 2, 6, 2, 1, 12, 1, 6, 6, 8, 2, 24, 1, 2, 9, 2, 1, 30, 1, 2, 3, 2, 1, 6, 2, 2, 6, 10, 1, 24, 3, 4, 6, 2, 1, 30, 1, 4, 9, 4, 2, 6, 1, 2, 3, 2, 1, 6, 1, 2, 12, 4, 4, 36, 1, 2, 9, 4, 1, 12]

cp's OEIS Frontend

A193807 Smallest positive integer k such that n*k^2 + 1 is a prime.

Table of values

List of values

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

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

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