cp's OEIS Frontend

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.

A113585 Numbers formed by arranging the digits of n in increasing order concatenated with arranging the digits in decreasing order.

Table of values

n a(n)
1 11
2 22
3 33
4 44
5 55
6 66
7 77
8 88
9 99
10 110
11 1111
12 1221
13 1331
14 1441
15 1551
16 1661
17 1771
18 1881
19 1991
20 220
21 1221
22 2222
23 2332
24 2442
25 2552
26 2662
27 2772
28 2882
29 2992
30 330
31 1331
32 2332
33 3333
34 3443
35 3553
36 3663
37 3773
38 3883
39 3993
40 440
41 1441
42 2442
43 3443
44 4444
45 4554
46 4664
47 4774
48 4884
49 4994
50 550
51 1551

List of values

[11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 220, 1221, 2222, 2332, 2442, 2552, 2662, 2772, 2882, 2992, 330, 1331, 2332, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 440, 1441, 2442, 3443, 4444, 4554, 4664, 4774, 4884, 4994, 550, 1551]

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

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