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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.

A246915 Numbers n such that sigma(n + sigma(n)) = sigma((n+1) + sigma(n+1)).

Table of values

n a(n)
1 4
2 7
3 16
4 50
5 494
6 4485
7 12585
8 20606
9 45590
10 46761
11 48614
12 64785
13 72609
14 137853
15 169898
16 196934
17 224186
18 321986
19 363037
20 466545
21 474573
22 532441
23 702374
24 811004
25 910125
26 982310
27 1141281
28 1282436
29 1288557
30 1531245
31 1602801
32 1635854
33 1695705
34 1842405
35 2246781
36 2725802
37 3018277
38 3343515

List of values

[4, 7, 16, 50, 494, 4485, 12585, 20606, 45590, 46761, 48614, 64785, 72609, 137853, 169898, 196934, 224186, 321986, 363037, 466545, 474573, 532441, 702374, 811004, 910125, 982310, 1141281, 1282436, 1288557, 1531245, 1602801, 1635854, 1695705, 1842405, 2246781, 2725802, 3018277, 3343515]

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

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