A288158 - cp's OEIS frontend

A288158 a(n) = smallest k such that kn2^n-1 is prime.

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

[2, 1, 1, 2, 3, 1, 3, 3, 5, 2, 9, 5, 7, 4, 3, 14, 8, 4, 4, 9, 11, 8, 3, 7, 9, 10, 2, 36, 3, 1, 4, 6, 4, 2, 17, 3, 7, 4, 6, 14, 17, 14, 51, 3, 9, 12, 38, 8, 13, 36, 64, 30, 14, 14, 4, 19, 13, 41, 5, 19, 4, 60, 8, 20, 3, 13, 24, 10, 31, 15, 14, 42, 19, 13, 1, 30, 11, 11]

cp's OEIS Frontend

A288158 a(n) = smallest k such that kn2^n-1 is prime.

Table of values

List of values

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

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

cp's OEIS Frontend

A288158 a(n) = smallest k such that k*n*2^n-1 is prime.

Table of values

List of values

A288158 a(n) = smallest k such that kn2^n-1 is prime.

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