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) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 89 |
| 3 | 617 |
| 4 | 2137 |
| 5 | 4897 |
| 6 | 10625 |
| 7 | 19777 |
| 8 | 34625 |
| 9 | 55217 |
| 10 | 84441 |
| 11 | 123385 |
| 12 | 174329 |
| 13 | 243145 |
| 14 | 325929 |
| 15 | 429329 |
| 16 | 557169 |
| 17 | 708961 |
| 18 | 894625 |
| 19 | 1110209 |
| 20 | 1363561 |
| 21 | 1656505 |
| 22 | 1994281 |