A122913 - cp's OEIS frontend

A122913 Minimum numbers k such that (k^2*2^n + 1) is prime.

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

[1, 1, 3, 1, 6, 2, 3, 1, 6, 5, 3, 4, 12, 2, 6, 1, 3, 10, 15, 5, 9, 5, 18, 25, 9, 13, 9, 14, 12, 7, 6, 9, 3, 17, 9, 9, 15, 12, 9, 6, 6, 3, 3, 11, 42, 18, 21, 9, 66, 10, 33, 5, 27, 7, 48, 80, 24, 40, 12, 20, 6, 10, 3, 5, 3, 7, 3, 79, 75, 63, 96, 40, 48, 20, 24, 10, 12, 5, 6, 15, 3, 22, 72, 11]

cp's OEIS Frontend

A122913 Minimum numbers k such that (k^2*2^n + 1) is prime.

Table of values

List of values

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

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

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