A099478 - cp's OEIS frontend

A099478 Least k such that k2^n(2^n-1) - 1 is prime.

n	a(n)
1	2
2	1
3	3
4	1
5	1
6	4
7	3
8	6
9	1
10	1
11	4
12	2
13	9
14	4
15	9
16	14
17	4
18	1
19	3
20	4
21	36
22	5
23	25
24	4
25	10
26	4
27	18
28	3
29	21
30	9
31	9
32	21
33	16
34	65
35	12
36	8
37	51
38	1
39	22
40	2
41	30
42	6
43	10
44	63
45	1
46	30
47	15
48	3
49	10
50	1
51	22
52	57
53	202
54	4
55	3
56	53
57	1
58	34
59	12
60	10
61	22
62	29
63	28
64	31
65	7
66	6
67	70
68	29
69	16
70	94
71	37
72	51
73	30
74	56
75	19
76	23
77	70
78	50
79	99
80	16
81	34
82	5

[2, 1, 3, 1, 1, 4, 3, 6, 1, 1, 4, 2, 9, 4, 9, 14, 4, 1, 3, 4, 36, 5, 25, 4, 10, 4, 18, 3, 21, 9, 9, 21, 16, 65, 12, 8, 51, 1, 22, 2, 30, 6, 10, 63, 1, 30, 15, 3, 10, 1, 22, 57, 202, 4, 3, 53, 1, 34, 12, 10, 22, 29, 28, 31, 7, 6, 70, 29, 16, 94, 37, 51, 30, 56, 19, 23, 70, 50, 99, 16, 34, 5]

cp's OEIS Frontend

A099478 Least k such that k2^n(2^n-1) - 1 is prime.

Table of values

List of values

n	a(n)
1	2
2	1
3	3
4	1
5	1
6	4
7	3
8	6
9	1
10	1
11	4
12	2
13	9
14	4
15	9
16	14
17	4
18	1
19	3
20	4
21	36
22	5
23	25
24	4
25	10
26	4
27	18
28	3
29	21
30	9
31	9
32	21
33	16
34	65
35	12
36	8
37	51
38	1
39	22
40	2
41	30
42	6
43	10
44	63
45	1
46	30
47	15
48	3
49	10
50	1
51	22
52	57
53	202
54	4
55	3
56	53
57	1
58	34
59	12
60	10
61	22
62	29
63	28
64	31
65	7
66	6
67	70
68	29
69	16
70	94
71	37
72	51
73	30
74	56
75	19
76	23
77	70
78	50
79	99
80	16
81	34
82	5

n	a(n)
1	2
2	1
3	3
4	1
5	1
6	4
7	3
8	6
9	1
10	1
11	4
12	2
13	9
14	4
15	9
16	14
17	4
18	1
19	3
20	4
21	36
22	5
23	25
24	4
25	10
26	4
27	18
28	3
29	21
30	9
31	9
32	21
33	16
34	65
35	12
36	8
37	51
38	1
39	22
40	2
41	30
42	6
43	10
44	63
45	1
46	30
47	15
48	3
49	10
50	1
51	22
52	57
53	202
54	4
55	3
56	53
57	1
58	34
59	12
60	10
61	22
62	29
63	28
64	31
65	7
66	6
67	70
68	29
69	16
70	94
71	37
72	51
73	30
74	56
75	19
76	23
77	70
78	50
79	99
80	16
81	34
82	5

cp's OEIS Frontend

A099478 Least k such that k*2^n*(2^n-1) - 1 is prime.

Table of values

List of values

A099478 Least k such that k2^n(2^n-1) - 1 is prime.

n	a(n)
1	2
2	1
3	3
4	1
5	1
6	4
7	3
8	6
9	1
10	1
11	4
12	2
13	9
14	4
15	9
16	14
17	4
18	1
19	3
20	4
21	36
22	5
23	25
24	4
25	10
26	4
27	18
28	3
29	21
30	9
31	9
32	21
33	16
34	65
35	12
36	8
37	51
38	1
39	22
40	2
41	30
42	6
43	10
44	63
45	1
46	30
47	15
48	3
49	10
50	1
51	22
52	57
53	202
54	4
55	3
56	53
57	1
58	34
59	12
60	10
61	22
62	29
63	28
64	31
65	7
66	6
67	70
68	29
69	16
70	94
71	37
72	51
73	30
74	56
75	19
76	23
77	70
78	50
79	99
80	16
81	34
82	5