A328266 - cp's OEIS frontend

A328266 a(n) is the least k > 0 such that prime(n) AND prime(n+k) <= 1 (where prime(n) denotes the n-th prime number and AND denotes the bitwise AND operator).

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

[2, 1, 2, 3, 2, 1, 5, 4, 4, 9, 14, 7, 6, 21, 29, 3, 27, 1, 14, 13, 11, 33, 10, 8, 7, 6, 6, 7, 3, 2, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 43, 42, 44, 48, 39, 41, 45, 36, 35, 34, 41, 40, 49, 30, 47, 31, 27, 26, 43]

cp's OEIS Frontend

A328266 a(n) is the least k > 0 such that prime(n) AND prime(n+k) <= 1 (where prime(n) denotes the n-th prime number and AND denotes the bitwise AND operator).

Table of values

List of values

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

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

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