A136626 - cp's OEIS frontend

A136626 For every number n in Ulam's spiral the sequence gives the number of primes around it (number n excluded).

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

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

cp's OEIS Frontend

A136626 For every number n in Ulam's spiral the sequence gives the number of primes around it (number n excluded).

Table of values

List of values

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

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

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