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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.

A328651 Composite k for which lcm(k, phi(k)) + lcm(k, tau(k)) = lcm(k, sigma(k)).

Table of values

n a(n)
1 135
2 546
3 672
4 9585
5 24570
6 51510
7 63855
8 190008
9 251370
10 323730
11 372438
12 486180
13 510570
14 723550
15 819000
16 1058910
17 1282365
18 1284192
19 1356030
20 3506390
21 5416200
22 5604480
23 6298625
24 15593760
25 17813250
26 18009000
27 20740590
28 26759370
29 27027000
30 27081000
31 29795040

List of values

[135, 546, 672, 9585, 24570, 51510, 63855, 190008, 251370, 323730, 372438, 486180, 510570, 723550, 819000, 1058910, 1282365, 1284192, 1356030, 3506390, 5416200, 5604480, 6298625, 15593760, 17813250, 18009000, 20740590, 26759370, 27027000, 27081000, 29795040]

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

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