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.

A008920 Let j = | i - i_written_backwards |, k = j + j_written_backwards; then k is in this sequence.

Table of values

n a(n)
1 0
2 18
3 99
4 198
5 261
6 342
7 423
8 504
9 585
10 666
11 747
12 828
13 909
14 1089
15 1170
16 1251
17 1332
18 1413
19 1494
20 1575
21 1656
22 1737
23 1818
24 1881
25 1998
26 2772
27 2871
28 3663
29 3762
30 4554
31 4653
32 5445
33 5544
34 6336
35 6435
36 7227
37 7326
38 8118
39 8217
40 9009
41 9108
42 9999
43 10890
44 10989
45 11781

List of values

[0, 18, 99, 198, 261, 342, 423, 504, 585, 666, 747, 828, 909, 1089, 1170, 1251, 1332, 1413, 1494, 1575, 1656, 1737, 1818, 1881, 1998, 2772, 2871, 3663, 3762, 4554, 4653, 5445, 5544, 6336, 6435, 7227, 7326, 8118, 8217, 9009, 9108, 9999, 10890, 10989, 11781]

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

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