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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.

A116014 Numbers k such that k + sigma(k) + sigma(sigma(k)) is a square.

Table of values

n a(n)
1 2
2 9
3 19
4 98
5 141
6 176
7 319
8 396
9 467
10 691
11 729
12 970
13 1113
14 1279
15 1447
16 1473
17 1873
18 1974
19 2403
20 3712
21 5208
22 5965
23 6777
24 7183
25 8353
26 8769
27 8881
28 8962
29 10137
30 10180
31 10771
32 11314
33 12016
34 12241
35 13624
36 15196
37 19683
38 19705
39 20053
40 20553
41 21241

List of values

[2, 9, 19, 98, 141, 176, 319, 396, 467, 691, 729, 970, 1113, 1279, 1447, 1473, 1873, 1974, 2403, 3712, 5208, 5965, 6777, 7183, 8353, 8769, 8881, 8962, 10137, 10180, 10771, 11314, 12016, 12241, 13624, 15196, 19683, 19705, 20053, 20553, 21241]

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

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