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.

A067237 Numbers k such that gcd(sigma(k),k) = k/5.

Table of values

n a(n)
1 5
2 10
3 15
4 30
5 60
6 90
7 140
8 420
9 1170
10 2480
11 3360
12 6200
13 7440
14 8190
15 18600
16 40640
17 114660
18 121920
19 131040
20 297600
21 997920
22 2618880
23 5059200
24 64995840
25 72602880
26 95472000
27 102136320
28 167751680
29 197308800
30 433305600
31 503255040
32 668304000
33 714954240
34 1307124000
35 1381161600
36 1502582400

List of values

[5, 10, 15, 30, 60, 90, 140, 420, 1170, 2480, 3360, 6200, 7440, 8190, 18600, 40640, 114660, 121920, 131040, 297600, 997920, 2618880, 5059200, 64995840, 72602880, 95472000, 102136320, 167751680, 197308800, 433305600, 503255040, 668304000, 714954240, 1307124000, 1381161600, 1502582400]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.