A172979 - cp's OEIS frontend

A172979 Primes with locations of right angle turns in Ulam square spiral (primes in A033638).

n	a(n)
1	2
2	3
3	5
4	7
5	13
6	17
7	31
8	37
9	43
10	73
11	101
12	157
13	197
14	211
15	241
16	257
17	307
18	401
19	421
20	463
21	577
22	601
23	677
24	757
25	1123
26	1297
27	1483
28	1601
29	1723
30	2551
31	2917
32	2971
33	3137
34	3307
35	3541
36	3907
37	4357
38	4423
39	4831
40	5113
41	5477
42	5701
43	6007
44	6163
45	6481
46	7057
47	8011
48	8101
49	8191
50	8837
51	9901

[2, 3, 5, 7, 13, 17, 31, 37, 43, 73, 101, 157, 197, 211, 241, 257, 307, 401, 421, 463, 577, 601, 677, 757, 1123, 1297, 1483, 1601, 1723, 2551, 2917, 2971, 3137, 3307, 3541, 3907, 4357, 4423, 4831, 5113, 5477, 5701, 6007, 6163, 6481, 7057, 8011, 8101, 8191, 8837, 9901]

cp's OEIS Frontend

A172979 Primes with locations of right angle turns in Ulam square spiral (primes in A033638).

Table of values

List of values