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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.

A072428 Numbers n for which there are exactly four k such that n = k + reverse(k).

Table of values

n a(n)
1 44
2 165
3 404
4 424
5 444
6 464
7 484
8 504
9 524
10 544
11 564
12 584
13 1331
14 1515
15 1535
16 1555
17 1575
18 1595
19 1615
20 1635
21 1655
22 1675
23 1695
24 2112
25 2651
26 3872
27 4004
28 5984
29 13031
30 13231
31 13431
32 13631
33 13831
34 14031
35 14231
36 14431
37 14631
38 14831
39 15015
40 16995

List of values

[44, 165, 404, 424, 444, 464, 484, 504, 524, 544, 564, 584, 1331, 1515, 1535, 1555, 1575, 1595, 1615, 1635, 1655, 1675, 1695, 2112, 2651, 3872, 4004, 5984, 13031, 13231, 13431, 13631, 13831, 14031, 14231, 14431, 14631, 14831, 15015, 16995]

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

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