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 | 0 |
| 2 | 1 |
| 3 | 100 |
| 4 | 10000 |
| 5 | 55225 |
| 6 | 1000000 |
| 7 | 1100401 |
| 8 | 1525225 |
| 9 | 5522500 |
| 10 | 8898289 |
| 11 | 22676644 |
| 12 | 23348224 |
| 13 | 100000000 |
| 14 | 107661376 |
| 15 | 110040100 |
| 16 | 110103049 |
| 17 | 110166016 |
| 18 | 119311929 |
| 19 | 125552025 |
| 20 | 152152225 |
| 21 | 152522500 |
| 22 | 153388225 |
| 23 | 155002500 |
| 24 | 160022500 |
| 25 | 204204100 |
| 26 | 219899241 |
| 27 | 262602025 |