A299207 - cp's OEIS frontend

A299207 Length of longest run of primes in any of the four diagonals starting from the center of a square number spiral with prime(n) at the center.

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	2
7	8
8	1
9	4
10	3
11	1
12	8
13	20
14	4
15	3
16	2
17	13
18	1
19	7
20	4
21	1
22	1
23	2
24	3
25	2
26	7
27	1
28	4
29	1
30	0
31	1
32	3
33	6
34	0
35	7
36	1
37	1
38	19
39	1
40	2
41	2
42	0
43	4
44	1
45	1
46	0
47	0
48	2
49	8
50	1
51	12
52	3
53	0
54	3
55	2
56	2
57	5
58	1
59	3
60	4
61	0
62	0
63	1
64	7
65	1
66	0
67	1
68	0
69	8
70	1
71	2
72	2
73	1
74	1
75	1
76	1
77	1
78	1
79	1
80	0
81	3
82	0
83	7
84	1
85	1

[0, 2, 3, 6, 5, 2, 8, 1, 4, 3, 1, 8, 20, 4, 3, 2, 13, 1, 7, 4, 1, 1, 2, 3, 2, 7, 1, 4, 1, 0, 1, 3, 6, 0, 7, 1, 1, 19, 1, 2, 2, 0, 4, 1, 1, 0, 0, 2, 8, 1, 12, 3, 0, 3, 2, 2, 5, 1, 3, 4, 0, 0, 1, 7, 1, 0, 1, 0, 8, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0, 3, 0, 7, 1, 1]

cp's OEIS Frontend

A299207 Length of longest run of primes in any of the four diagonals starting from the center of a square number spiral with prime(n) at the center.

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	2
7	8
8	1
9	4
10	3
11	1
12	8
13	20
14	4
15	3
16	2
17	13
18	1
19	7
20	4
21	1
22	1
23	2
24	3
25	2
26	7
27	1
28	4
29	1
30	0
31	1
32	3
33	6
34	0
35	7
36	1
37	1
38	19
39	1
40	2
41	2
42	0
43	4
44	1
45	1
46	0
47	0
48	2
49	8
50	1
51	12
52	3
53	0
54	3
55	2
56	2
57	5
58	1
59	3
60	4
61	0
62	0
63	1
64	7
65	1
66	0
67	1
68	0
69	8
70	1
71	2
72	2
73	1
74	1
75	1
76	1
77	1
78	1
79	1
80	0
81	3
82	0
83	7
84	1
85	1

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	2
7	8
8	1
9	4
10	3
11	1
12	8
13	20
14	4
15	3
16	2
17	13
18	1
19	7
20	4
21	1
22	1
23	2
24	3
25	2
26	7
27	1
28	4
29	1
30	0
31	1
32	3
33	6
34	0
35	7
36	1
37	1
38	19
39	1
40	2
41	2
42	0
43	4
44	1
45	1
46	0
47	0
48	2
49	8
50	1
51	12
52	3
53	0
54	3
55	2
56	2
57	5
58	1
59	3
60	4
61	0
62	0
63	1
64	7
65	1
66	0
67	1
68	0
69	8
70	1
71	2
72	2
73	1
74	1
75	1
76	1
77	1
78	1
79	1
80	0
81	3
82	0
83	7
84	1
85	1

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	2
7	8
8	1
9	4
10	3
11	1
12	8
13	20
14	4
15	3
16	2
17	13
18	1
19	7
20	4
21	1
22	1
23	2
24	3
25	2
26	7
27	1
28	4
29	1
30	0
31	1
32	3
33	6
34	0
35	7
36	1
37	1
38	19
39	1
40	2
41	2
42	0
43	4
44	1
45	1
46	0
47	0
48	2
49	8
50	1
51	12
52	3
53	0
54	3
55	2
56	2
57	5
58	1
59	3
60	4
61	0
62	0
63	1
64	7
65	1
66	0
67	1
68	0
69	8
70	1
71	2
72	2
73	1
74	1
75	1
76	1
77	1
78	1
79	1
80	0
81	3
82	0
83	7
84	1
85	1