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 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 4 |
| 5 | 5221225 |
| 6 | 69696 |
| 7 | 1002001 |
| 8 | 44944 |
| 9 | 9 |
| 10 | 121 |
| 11 | 484 |
| 12 | 69696 |
| 13 | 484 |
| 14 | 522666037791100950480675576084059001197730666225 |
| 15 | 69696 |
| 16 | 1002001 |
| 17 | 69696 |
| 18 | 69696 |
| 19 | 10201 |
| 20 | 12321 |
| 21 | 121 |
| 22 | 12100022220012621002222000121 |
| 23 | 12122010222622201022121 |
| 24 | 123230205292502032321 |
| 25 | 102012022050220210201 |
| 26 | 94206450305460249 |
| 27 | 1000220232126212320220001 |
| 28 | 12104402820440121 |
| 29 | 40804 |
| 30 | 44944 |