A372041 - cp's OEIS frontend

A372041 Least prime p such that the sum of squares of the 2n + 1 consecutive primes starting with p is prime, or -1 if no such p exists.

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

[3, 3, 5, 3, 3, 5, -1, 5, 5, -1, 3, 7, -1, 3, 13, -1, 5, 5, -1, 7, 23, -1, 13, 5, -1, 7, 5, -1, 59, 29, 3, 3, 5, -1, 3, 5, -1, 13, 11, -1, 37, 23, -1, 43, 11, -1, 3, 5, -1, 11, 5, -1, 5, 19, -1, 5, 43, -1, 13, 29, -1, 7, 19, -1, 41, 47, -1, 13, 11, 3, 7, 5, -1, 29, 7, -1, 79, 13, 3, 3]

cp's OEIS Frontend

A372041 Least prime p such that the sum of squares of the 2n + 1 consecutive primes starting with p is prime, or -1 if no such p exists.

Table of values

List of values

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

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

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