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.

A081391 Numbers k such that the central binomial coefficient C(2*k,k) has only one prime divisor whose exponent equals one.

Table of values

n a(n)
1 3
2 6
3 7
4 8
5 9
6 10
7 11
8 12
9 16
10 21
11 22
12 28
13 29
14 30
15 31
16 36
17 37
18 54
19 55
20 57
21 58
22 110
23 171
24 784
25 786

List of values

[3, 6, 7, 8, 9, 10, 11, 12, 16, 21, 22, 28, 29, 30, 31, 36, 37, 54, 55, 57, 58, 110, 171, 784, 786]