A210733 - cp's OEIS frontend

A210733 Least k > n-1 such that 4^n + 2^k - 1 is a prime number.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	6
7	12
8	9
9	10
10	10
11	27
12	13
13	15
14	22
15	16
16	16
17	18
18	19
19	39
20	22
21	22
22	43
23	24
24	24
25	48
26	26
27	28
28	43
29	32
30	38
31	75
32	33
33	36
34	58
35	35
36	57
37	55
38	47
39	48
40	52
41	54
42	72
43	52
44	51
45	72
46	54
47	72
48	53
49	64
50	62
51	52
52	52
53	63
54	60
55	55
56	60
57	316
58	70
59	63
60	68
61	64
62	96
63	66
64	115
65	66
66	92

[1, 2, 3, 4, 6, 6, 12, 9, 10, 10, 27, 13, 15, 22, 16, 16, 18, 19, 39, 22, 22, 43, 24, 24, 48, 26, 28, 43, 32, 38, 75, 33, 36, 58, 35, 57, 55, 47, 48, 52, 54, 72, 52, 51, 72, 54, 72, 53, 64, 62, 52, 52, 63, 60, 55, 60, 316, 70, 63, 68, 64, 96, 66, 115, 66, 92]

cp's OEIS Frontend

A210733 Least k > n-1 such that 4^n + 2^k - 1 is a prime number.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	6
7	12
8	9
9	10
10	10
11	27
12	13
13	15
14	22
15	16
16	16
17	18
18	19
19	39
20	22
21	22
22	43
23	24
24	24
25	48
26	26
27	28
28	43
29	32
30	38
31	75
32	33
33	36
34	58
35	35
36	57
37	55
38	47
39	48
40	52
41	54
42	72
43	52
44	51
45	72
46	54
47	72
48	53
49	64
50	62
51	52
52	52
53	63
54	60
55	55
56	60
57	316
58	70
59	63
60	68
61	64
62	96
63	66
64	115
65	66
66	92

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	6
7	12
8	9
9	10
10	10
11	27
12	13
13	15
14	22
15	16
16	16
17	18
18	19
19	39
20	22
21	22
22	43
23	24
24	24
25	48
26	26
27	28
28	43
29	32
30	38
31	75
32	33
33	36
34	58
35	35
36	57
37	55
38	47
39	48
40	52
41	54
42	72
43	52
44	51
45	72
46	54
47	72
48	53
49	64
50	62
51	52
52	52
53	63
54	60
55	55
56	60
57	316
58	70
59	63
60	68
61	64
62	96
63	66
64	115
65	66
66	92

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	6
7	12
8	9
9	10
10	10
11	27
12	13
13	15
14	22
15	16
16	16
17	18
18	19
19	39
20	22
21	22
22	43
23	24
24	24
25	48
26	26
27	28
28	43
29	32
30	38
31	75
32	33
33	36
34	58
35	35
36	57
37	55
38	47
39	48
40	52
41	54
42	72
43	52
44	51
45	72
46	54
47	72
48	53
49	64
50	62
51	52
52	52
53	63
54	60
55	55
56	60
57	316
58	70
59	63
60	68
61	64
62	96
63	66
64	115
65	66
66	92