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.

A260097 Numbers n = concat(s,t) such that n = sigma(s*t), where sigma(x) is the sum of the divisors of x.

Table of values

n a(n)
1 124
2 2352
3 2604
4 6804
5 15240
6 63180
7 225302
8 632400
9 1531152
10 2537040
11 4592588
12 7160400
13 7603680
14 26100144
15 26378352
16 31492032
17 33747840
18 49447728
19 88385040
20 104941200
21 162496048
22 175600040
23 197499456
24 403242624
25 483741216
26 797091840
27 2077442640
28 2942021520
29 4045874976
30 4828299840

List of values

[124, 2352, 2604, 6804, 15240, 63180, 225302, 632400, 1531152, 2537040, 4592588, 7160400, 7603680, 26100144, 26378352, 31492032, 33747840, 49447728, 88385040, 104941200, 162496048, 175600040, 197499456, 403242624, 483741216, 797091840, 2077442640, 2942021520, 4045874976, 4828299840]

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

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