A361744 - cp's OEIS frontend

A361744 A(n,k) is the least m such that there are k primes in the set {prime(n) + 2^i | 1 <= i <= m}, or -1 if no such number exists; square array A(n,k), n > 1, k >= 1, read by antidiagonals.

n	a(n)
2	1
3	2
4	1
5	3
6	3
7	2
8	4
9	5
10	4
11	1
12	6
13	11
14	6
15	3
16	2
17	7
18	47
19	8
20	5
21	4
22	1
23	12
24	53
25	10
26	7
27	8
28	13
29	2
30	15
31	141
32	16
33	9
34	20
35	21
36	6
37	3
38	16
39	143
40	18
41	15
42	38
43	33
44	30
45	7
46	1
47	18
48	191
49	20
50	23
51	64
52	81
53	162
54	39
55	3
56	4
57	28
58	273
59	28
60	29
61	80
62	129
63	654
64	79
65	5
66	12
67	2

[1, 2, 1, 3, 3, 2, 4, 5, 4, 1, 6, 11, 6, 3, 2, 7, 47, 8, 5, 4, 1, 12, 53, 10, 7, 8, 13, 2, 15, 141, 16, 9, 20, 21, 6, 3, 16, 143, 18, 15, 38, 33, 30, 7, 1, 18, 191, 20, 23, 64, 81, 162, 39, 3, 4, 28, 273, 28, 29, 80, 129, 654, 79, 5, 12, 2]

cp's OEIS Frontend

A361744 A(n,k) is the least m such that there are k primes in the set {prime(n) + 2^i | 1 <= i <= m}, or -1 if no such number exists; square array A(n,k), n > 1, k >= 1, read by antidiagonals.

Table of values

List of values

n	a(n)
2	1
3	2
4	1
5	3
6	3
7	2
8	4
9	5
10	4
11	1
12	6
13	11
14	6
15	3
16	2
17	7
18	47
19	8
20	5
21	4
22	1
23	12
24	53
25	10
26	7
27	8
28	13
29	2
30	15
31	141
32	16
33	9
34	20
35	21
36	6
37	3
38	16
39	143
40	18
41	15
42	38
43	33
44	30
45	7
46	1
47	18
48	191
49	20
50	23
51	64
52	81
53	162
54	39
55	3
56	4
57	28
58	273
59	28
60	29
61	80
62	129
63	654
64	79
65	5
66	12
67	2

n	a(n)
2	1
3	2
4	1
5	3
6	3
7	2
8	4
9	5
10	4
11	1
12	6
13	11
14	6
15	3
16	2
17	7
18	47
19	8
20	5
21	4
22	1
23	12
24	53
25	10
26	7
27	8
28	13
29	2
30	15
31	141
32	16
33	9
34	20
35	21
36	6
37	3
38	16
39	143
40	18
41	15
42	38
43	33
44	30
45	7
46	1
47	18
48	191
49	20
50	23
51	64
52	81
53	162
54	39
55	3
56	4
57	28
58	273
59	28
60	29
61	80
62	129
63	654
64	79
65	5
66	12
67	2

n	a(n)
2	1
3	2
4	1
5	3
6	3
7	2
8	4
9	5
10	4
11	1
12	6
13	11
14	6
15	3
16	2
17	7
18	47
19	8
20	5
21	4
22	1
23	12
24	53
25	10
26	7
27	8
28	13
29	2
30	15
31	141
32	16
33	9
34	20
35	21
36	6
37	3
38	16
39	143
40	18
41	15
42	38
43	33
44	30
45	7
46	1
47	18
48	191
49	20
50	23
51	64
52	81
53	162
54	39
55	3
56	4
57	28
58	273
59	28
60	29
61	80
62	129
63	654
64	79
65	5
66	12
67	2