A125876 - cp's OEIS frontend

A125876 Prime numbers n such that cos(2pi/n) is an algebraic number of a 13-smooth degree, but not 11-smooth.

n	a(n)
1	53
2	79
3	131
4	157
5	313
6	521
7	547
8	677
9	859
10	911
11	937
12	1093
13	1171
14	1249
15	1301
16	1873
17	1951
18	2003
19	2029
20	2081
21	2341
22	2549
23	2731
24	2861
25	3121
26	3251
27	3329
28	3433
29	3511
30	3719
31	3823
32	4057
33	4733
34	4993
35	5851
36	6007
37	6553
38	6761
39	7151
40	7489
41	7723
42	8009

[53, 79, 131, 157, 313, 521, 547, 677, 859, 911, 937, 1093, 1171, 1249, 1301, 1873, 1951, 2003, 2029, 2081, 2341, 2549, 2731, 2861, 3121, 3251, 3329, 3433, 3511, 3719, 3823, 4057, 4733, 4993, 5851, 6007, 6553, 6761, 7151, 7489, 7723, 8009]

cp's OEIS Frontend

A125876 Prime numbers n such that cos(2pi/n) is an algebraic number of a 13-smooth degree, but not 11-smooth.

Table of values

List of values