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.

A279509 a(n) = largest number k such that floor(phi(k)/tau(k)) = n.

Table of values

n a(n)
0 12
1 60
2 180
3 240
4 420
5 480
6 840
7 462
8 1260
9 1680
10 1440
11 690
12 2520
13 2100
14 2160
15 2310
16 3360
17 2400
18 3780
19 5040
20 4620
21 3600
22 3300
23 1410
24 5460
25 4080
26 6300
27 7560
28 5880
29 4140
30 9240
31 2646
32 10080
33 6600
34 6480
35 7200
36 10920
37 8820
38 9360
39 2370
40 13860
41 8640
42 8160
43 15120

List of values

[12, 60, 180, 240, 420, 480, 840, 462, 1260, 1680, 1440, 690, 2520, 2100, 2160, 2310, 3360, 2400, 3780, 5040, 4620, 3600, 3300, 1410, 5460, 4080, 6300, 7560, 5880, 4140, 9240, 2646, 10080, 6600, 6480, 7200, 10920, 8820, 9360, 2370, 13860, 8640, 8160, 15120]

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

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