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.
| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 225 |
| 3 | 256 |
| 4 | 625 |
| 5 | 5625 |
| 6 | 55225 |
| 7 | 225625 |
| 8 | 265225 |
| 9 | 266256 |
| 10 | 525625 |
| 11 | 26265625 |
| 12 | 56625625 |
| 13 | 525555625 |
| 14 | 556252225 |
| 15 | 5252625625 |
| 16 | 255555525625 |
| 17 | 265652622225 |
| 18 | 6255626265625 |
| 19 | 225255552522256 |
| 20 | 562222665225225 |
| 21 | 5222566262655625 |
| 22 | 22225226555625625 |
| 23 | 62566655262225625 |
| 24 | 65552556565552225 |