cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A230869 Primes p such that the class number h-tilde_p^{+} of the real cyclotomic field Q(zeta_p + zeta_p^(-1)) is greater than 1.

Table of values

n a(n)
1 163
2 191
3 229
4 257
5 277
6 313
7 349
8 397
9 401
10 457
11 491
12 521
13 547
14 577
15 607
16 631
17 641
18 709
19 733
20 761
21 821
22 827
23 829
24 853
25 857
26 877
27 937
28 941
29 953
30 977
31 1009
32 1063
33 1069
34 1093
35 1129
36 1153
37 1229
38 1231
39 1297
40 1373
41 1381
42 1399
43 1429
44 1459
45 1489
46 1567
47 1601
48 1697
49 1699
50 1777
51 1789
52 1831
53 1861
54 1873
55 1879
56 1889
57 1901
58 1951

List of values

[163, 191, 229, 257, 277, 313, 349, 397, 401, 457, 491, 521, 547, 577, 607, 631, 641, 709, 733, 761, 821, 827, 829, 853, 857, 877, 937, 941, 953, 977, 1009, 1063, 1069, 1093, 1129, 1153, 1229, 1231, 1297, 1373, 1381, 1399, 1429, 1459, 1489, 1567, 1601, 1697, 1699, 1777, 1789, 1831, 1861, 1873, 1879, 1889, 1901, 1951]