A136627 - cp's OEIS frontend

A136627 For every number n in Ulam's spiral the sequence gives the number of primes around it (number n included).

n	a(n)
1	4
2	3
3	4
4	3
5	3
6	3
7	3
8	3
9	3
10	2
11	4
12	5
13	4
14	2
15	2
16	2
17	3
18	3
19	4
20	3
21	3
22	2
23	3
24	2
25	1
26	0
27	2
28	3
29	4
30	3
31	3
32	3
33	3
34	1
35	2
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	3
44	1
45	1
46	2
47	3
48	2
49	1
50	1
51	1
52	1
53	2
54	2
55	3
56	2
57	2
58	2
59	2
60	2
61	2
62	2
63	2
64	1
65	3
66	3
67	3
68	1
69	2
70	3
71	5
72	4
73	4
74	3
75	2
76	0
77	1
78	2
79	2
80	1
81	1
82	1
83	1
84	1
85	2
86	2
87	2
88	1
89	2
90	2
91	1
92	0
93	2
94	2
95	4
96	3
97	3
98	1
99	0
100	1
101	1
102	2

[4, 3, 4, 3, 3, 3, 3, 3, 3, 2, 4, 5, 4, 2, 2, 2, 3, 3, 4, 3, 3, 2, 3, 2, 1, 0, 2, 3, 4, 3, 3, 3, 3, 1, 2, 2, 3, 3, 3, 2, 3, 3, 3, 1, 1, 2, 3, 2, 1, 1, 1, 1, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 3, 3, 3, 1, 2, 3, 5, 4, 4, 3, 2, 0, 1, 2, 2, 1, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 1, 0, 2, 2, 4, 3, 3, 1, 0, 1, 1, 2]

cp's OEIS Frontend

A136627 For every number n in Ulam's spiral the sequence gives the number of primes around it (number n included).

Table of values

List of values

n	a(n)
1	4
2	3
3	4
4	3
5	3
6	3
7	3
8	3
9	3
10	2
11	4
12	5
13	4
14	2
15	2
16	2
17	3
18	3
19	4
20	3
21	3
22	2
23	3
24	2
25	1
26	0
27	2
28	3
29	4
30	3
31	3
32	3
33	3
34	1
35	2
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	3
44	1
45	1
46	2
47	3
48	2
49	1
50	1
51	1
52	1
53	2
54	2
55	3
56	2
57	2
58	2
59	2
60	2
61	2
62	2
63	2
64	1
65	3
66	3
67	3
68	1
69	2
70	3
71	5
72	4
73	4
74	3
75	2
76	0
77	1
78	2
79	2
80	1
81	1
82	1
83	1
84	1
85	2
86	2
87	2
88	1
89	2
90	2
91	1
92	0
93	2
94	2
95	4
96	3
97	3
98	1
99	0
100	1
101	1
102	2

n	a(n)
1	4
2	3
3	4
4	3
5	3
6	3
7	3
8	3
9	3
10	2
11	4
12	5
13	4
14	2
15	2
16	2
17	3
18	3
19	4
20	3
21	3
22	2
23	3
24	2
25	1
26	0
27	2
28	3
29	4
30	3
31	3
32	3
33	3
34	1
35	2
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	3
44	1
45	1
46	2
47	3
48	2
49	1
50	1
51	1
52	1
53	2
54	2
55	3
56	2
57	2
58	2
59	2
60	2
61	2
62	2
63	2
64	1
65	3
66	3
67	3
68	1
69	2
70	3
71	5
72	4
73	4
74	3
75	2
76	0
77	1
78	2
79	2
80	1
81	1
82	1
83	1
84	1
85	2
86	2
87	2
88	1
89	2
90	2
91	1
92	0
93	2
94	2
95	4
96	3
97	3
98	1
99	0
100	1
101	1
102	2

n	a(n)
1	4
2	3
3	4
4	3
5	3
6	3
7	3
8	3
9	3
10	2
11	4
12	5
13	4
14	2
15	2
16	2
17	3
18	3
19	4
20	3
21	3
22	2
23	3
24	2
25	1
26	0
27	2
28	3
29	4
30	3
31	3
32	3
33	3
34	1
35	2
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	3
44	1
45	1
46	2
47	3
48	2
49	1
50	1
51	1
52	1
53	2
54	2
55	3
56	2
57	2
58	2
59	2
60	2
61	2
62	2
63	2
64	1
65	3
66	3
67	3
68	1
69	2
70	3
71	5
72	4
73	4
74	3
75	2
76	0
77	1
78	2
79	2
80	1
81	1
82	1
83	1
84	1
85	2
86	2
87	2
88	1
89	2
90	2
91	1
92	0
93	2
94	2
95	4
96	3
97	3
98	1
99	0
100	1
101	1
102	2