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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.

A219033 Numbers n such that n = x + y, sigma_1(n) = sigma_1(x) + sigma_1(y) and sigma_2(n) = sigma_2(x) + sigma_2(y).

Table of values

n a(n)
1 434
2 2170
3 4774
4 5642
5 7378
6 8246
7 9982
8 10850
9 12586
10 16058
11 17794
12 18662
13 20398
14 23002
15 23870
16 25606
17 26474
18 28210
19 29078
20 30814
21 31682
22 34286
23 36022
24 36890
25 38626
26 41230
27 42098
28 43834
29 44702
30 47306
31 49042
32 49910
33 52514
34 54250
35 55118
36 56854
37 59458
38 60326

List of values

[434, 2170, 4774, 5642, 7378, 8246, 9982, 10850, 12586, 16058, 17794, 18662, 20398, 23002, 23870, 25606, 26474, 28210, 29078, 30814, 31682, 34286, 36022, 36890, 38626, 41230, 42098, 43834, 44702, 47306, 49042, 49910, 52514, 54250, 55118, 56854, 59458, 60326]

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

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