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.

A128461 Numbers k such that 21^k - 2 is a prime.

Table of values

n a(n)
1 1
2 2
3 4
4 10
5 21
6 25
7 27
8 32
9 60
10 88
11 106
12 120
13 146
14 264
15 828
16 965
17 1944
18 4822
19 12089
20 14427
21 17354
22 42335
23 46395
24 58348
25 190632

List of values

[1, 2, 4, 10, 21, 25, 27, 32, 60, 88, 106, 120, 146, 264, 828, 965, 1944, 4822, 12089, 14427, 17354, 42335, 46395, 58348, 190632]