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.

A254999 Numbers n of the form 4*k+2 such that (sigma(n) mod n) divides n, where sigma is given by A000203.

Table of values

n a(n)
1 2
2 18
3 234
4 650
5 1890
6 8190
7 14850
8 61110
9 64890
10 92070
11 157950
12 162162
13 206910
14 258390
15 365310
16 383130
17 558558
18 702702
19 711450
20 743850
21 822510
22 916110
23 1140750
24 1561950
25 1862190
26 2357550
27 4977126
28 5782590

List of values

[2, 18, 234, 650, 1890, 8190, 14850, 61110, 64890, 92070, 157950, 162162, 206910, 258390, 365310, 383130, 558558, 702702, 711450, 743850, 822510, 916110, 1140750, 1561950, 1862190, 2357550, 4977126, 5782590]

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

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