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.

A380222 Highest integer k such that the multiplicative group modulo k is a subgroup of the symmetric group S_n.

Table of values

n a(n)
1 2
2 6
3 6
4 12
5 18
6 30
7 42
8 60
9 90
10 126
11 210
12 252
13 420
14 630
15 840
16 1260
17 1680
18 2730
19 3276
20 5460
21 8190
22 10920
23 16380
24 21840
25 32760
26 40950
27 65520
28 90090
29 120120
30 180180
31 253890
32 360360
33 507780
34 720720
35 1015560
36 1332240
37 2031120
38 2792790
39 3996720
40 5585580

List of values

[2, 6, 6, 12, 18, 30, 42, 60, 90, 126, 210, 252, 420, 630, 840, 1260, 1680, 2730, 3276, 5460, 8190, 10920, 16380, 21840, 32760, 40950, 65520, 90090, 120120, 180180, 253890, 360360, 507780, 720720, 1015560, 1332240, 2031120, 2792790, 3996720, 5585580]