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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.

A173618 Numbers k such that tau(phi(k)) = rad(k).

Table of values

n a(n)
1 1
2 4
3 36
4 54
5 96
6 200
7 448
8 1280
9 2700
10 4500
11 5103
12 9720
13 11264
14 14112
15 14580
16 17280
17 26624
18 32928
19 48000
20 54432
21 71442
22 75000
23 81648
24 152064
25 184320
26 187500
27 258048
28 307200
29 350000
30 637875
31 1250235
32 1344560
33 1557504
34 2044416
35 2187500
36 2367488
37 3234816

List of values

[1, 4, 36, 54, 96, 200, 448, 1280, 2700, 4500, 5103, 9720, 11264, 14112, 14580, 17280, 26624, 32928, 48000, 54432, 71442, 75000, 81648, 152064, 184320, 187500, 258048, 307200, 350000, 637875, 1250235, 1344560, 1557504, 2044416, 2187500, 2367488, 3234816]

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

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