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.

A230012 Numbers n such that phi(n) = sigma(n) - reversal(sigma(n)).

Table of values

n a(n)
1 19
2 199
3 437
4 603
5 1999
6 12834
7 16348
8 21293
9 22183
10 23383
11 25273
12 27263
13 44377
14 46367
15 199999
16 670661
17 691351
18 803851
19 845321
20 1425650
21 2103643
22 2111191
23 2123893
24 2174143
25 2543773
26 2552723
27 2753713
28 3791659
29 4003997
30 4034347
31 4133332
32 4223887
33 4244287
34 4492429
35 4663667

List of values

[19, 199, 437, 603, 1999, 12834, 16348, 21293, 22183, 23383, 25273, 27263, 44377, 46367, 199999, 670661, 691351, 803851, 845321, 1425650, 2103643, 2111191, 2123893, 2174143, 2543773, 2552723, 2753713, 3791659, 4003997, 4034347, 4133332, 4223887, 4244287, 4492429, 4663667]