A356477 - cp's OEIS frontend

A356477 a(n) is the start of the first sequence of 2n+1 consecutive primes p_1, p_2, ..., p_(2n+1) such that p_1p_2 + p_2p_3 + ... + p_(2n)p_(2n+1) + p_(2n+1)*p_1 is prime.

n	a(n)
1	2
2	19
3	19
4	2
5	23
6	2
7	7
8	7
9	2
10	5
11	113
12	5
13	29
14	13
15	67
16	53
17	11
18	11
19	5
20	23
21	7
22	43
23	5
24	2
25	31
26	73
27	13
28	3
29	89
30	5
31	11
32	3
33	89
34	31
35	43
36	2
37	37
38	2
39	23
40	7
41	11
42	19
43	43
44	23
45	5
46	2
47	23
48	3
49	29
50	5
51	17
52	3
53	31
54	29
55	53
56	29
57	7
58	13
59	73
60	3
61	5
62	43
63	29
64	17
65	5
66	37
67	19
68	11
69	71
70	7
71	2
72	43
73	13
74	19
75	2
76	59
77	7
78	29
79	113
80	13
81	5
82	11

[2, 19, 19, 2, 23, 2, 7, 7, 2, 5, 113, 5, 29, 13, 67, 53, 11, 11, 5, 23, 7, 43, 5, 2, 31, 73, 13, 3, 89, 5, 11, 3, 89, 31, 43, 2, 37, 2, 23, 7, 11, 19, 43, 23, 5, 2, 23, 3, 29, 5, 17, 3, 31, 29, 53, 29, 7, 13, 73, 3, 5, 43, 29, 17, 5, 37, 19, 11, 71, 7, 2, 43, 13, 19, 2, 59, 7, 29, 113, 13, 5, 11]

cp's OEIS Frontend

A356477 a(n) is the start of the first sequence of 2n+1 consecutive primes p_1, p_2, ..., p_(2n+1) such that p_1p_2 + p_2p_3 + ... + p_(2n)p_(2n+1) + p_(2n+1)*p_1 is prime.

Table of values

List of values

n	a(n)
1	2
2	19
3	19
4	2
5	23
6	2
7	7
8	7
9	2
10	5
11	113
12	5
13	29
14	13
15	67
16	53
17	11
18	11
19	5
20	23
21	7
22	43
23	5
24	2
25	31
26	73
27	13
28	3
29	89
30	5
31	11
32	3
33	89
34	31
35	43
36	2
37	37
38	2
39	23
40	7
41	11
42	19
43	43
44	23
45	5
46	2
47	23
48	3
49	29
50	5
51	17
52	3
53	31
54	29
55	53
56	29
57	7
58	13
59	73
60	3
61	5
62	43
63	29
64	17
65	5
66	37
67	19
68	11
69	71
70	7
71	2
72	43
73	13
74	19
75	2
76	59
77	7
78	29
79	113
80	13
81	5
82	11

n	a(n)
1	2
2	19
3	19
4	2
5	23
6	2
7	7
8	7
9	2
10	5
11	113
12	5
13	29
14	13
15	67
16	53
17	11
18	11
19	5
20	23
21	7
22	43
23	5
24	2
25	31
26	73
27	13
28	3
29	89
30	5
31	11
32	3
33	89
34	31
35	43
36	2
37	37
38	2
39	23
40	7
41	11
42	19
43	43
44	23
45	5
46	2
47	23
48	3
49	29
50	5
51	17
52	3
53	31
54	29
55	53
56	29
57	7
58	13
59	73
60	3
61	5
62	43
63	29
64	17
65	5
66	37
67	19
68	11
69	71
70	7
71	2
72	43
73	13
74	19
75	2
76	59
77	7
78	29
79	113
80	13
81	5
82	11

cp's OEIS Frontend

A356477 a(n) is the start of the first sequence of 2*n+1 consecutive primes p_1, p_2, ..., p_(2*n+1) such that p_1*p_2 + p_2*p_3 + ... + p_(2*n)*p_(2*n+1) + p_(2*n+1)*p_1 is prime.

Table of values

List of values

A356477 a(n) is the start of the first sequence of 2n+1 consecutive primes p_1, p_2, ..., p_(2n+1) such that p_1p_2 + p_2p_3 + ... + p_(2n)p_(2n+1) + p_(2n+1)*p_1 is prime.

n	a(n)
1	2
2	19
3	19
4	2
5	23
6	2
7	7
8	7
9	2
10	5
11	113
12	5
13	29
14	13
15	67
16	53
17	11
18	11
19	5
20	23
21	7
22	43
23	5
24	2
25	31
26	73
27	13
28	3
29	89
30	5
31	11
32	3
33	89
34	31
35	43
36	2
37	37
38	2
39	23
40	7
41	11
42	19
43	43
44	23
45	5
46	2
47	23
48	3
49	29
50	5
51	17
52	3
53	31
54	29
55	53
56	29
57	7
58	13
59	73
60	3
61	5
62	43
63	29
64	17
65	5
66	37
67	19
68	11
69	71
70	7
71	2
72	43
73	13
74	19
75	2
76	59
77	7
78	29
79	113
80	13
81	5
82	11