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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.

A248815 Numbers equal to the arithmetic derivative of their Euler totient function.

Table of values

n a(n)
1 31
2 32
3 80
4 81
5 112
6 176
7 192
8 244
9 368
10 752
11 859
12 912
13 944
14 1296
15 1328
16 1712
17 1723
18 2672
19 2864
20 3024
21 3632
22 4208
23 5552
24 5744
25 6128
26 6156
27 7472
28 7664
29 8048
30 8748
31 9008
32 9392
33 11504
34 13424
35 13808
36 14192
37 15728
38 16304
39 18992
40 20412
41 20528
42 20912
43 21104
44 21872

List of values

[31, 32, 80, 81, 112, 176, 192, 244, 368, 752, 859, 912, 944, 1296, 1328, 1712, 1723, 2672, 2864, 3024, 3632, 4208, 5552, 5744, 6128, 6156, 7472, 7664, 8048, 8748, 9008, 9392, 11504, 13424, 13808, 14192, 15728, 16304, 18992, 20412, 20528, 20912, 21104, 21872]

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

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