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.

A175823 Numbers k such that gcd(k^2, reverse(k^2)) = k.

Table of values

n a(n)
1 1
2 9
3 297
4 513
5 783
6 999
7 1323
8 1331
9 4961
10 10989
11 11979
12 12969
13 14733
14 20402
15 29088
16 89109
17 99999
18 109989
19 122221
20 188887
21 210789
22 218097
23 377199
24 477773
25 483516
26 525503
27 718189
28 1099989
29 2128806
30 2920819
31 7769223
32 9999999
33 10999989
34 12222221
35 19097181
36 21510896

List of values

[1, 9, 297, 513, 783, 999, 1323, 1331, 4961, 10989, 11979, 12969, 14733, 20402, 29088, 89109, 99999, 109989, 122221, 188887, 210789, 218097, 377199, 477773, 483516, 525503, 718189, 1099989, 2128806, 2920819, 7769223, 9999999, 10999989, 12222221, 19097181, 21510896]

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

Content is available under The OEIS End-User License Agreement.