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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.

A331751 Numbers k such that A048675(sigma(k)) is equal to A048675(2*k).

Table of values

n a(n)
1 2
2 6
3 27
4 28
5 84
6 270
7 496
8 1053
9 1120
10 1488
11 1625
12 1638
13 3360
14 3780
15 4875
16 8128
17 10530
18 24384
19 66960
20 147420
21 167400
22 406224
23 611226
24 775000
25 872960
26 943250
27 1097280
28 1245699
29 1255338
30 1303533
31 1464320
32 1686400
33 1740024
34 1922375
35 1952500
36 2011625
37 2193408
38 2325000
39 2611440
40 2618880
41 2829750
42 2941029
43 4392960

List of values

[2, 6, 27, 28, 84, 270, 496, 1053, 1120, 1488, 1625, 1638, 3360, 3780, 4875, 8128, 10530, 24384, 66960, 147420, 167400, 406224, 611226, 775000, 872960, 943250, 1097280, 1245699, 1255338, 1303533, 1464320, 1686400, 1740024, 1922375, 1952500, 2011625, 2193408, 2325000, 2611440, 2618880, 2829750, 2941029, 4392960]

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

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