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 | 9 |
| 3 | 2 |
| 4 | 22 |
| 5 | 419 |
| 6 | 591 |
| 7 | 898 |
| 8 | 915 |
| 9 | 285 |
| 10 | 3618 |
| 11 | 10367 |
| 12 | 5396 |
| 13 | 1192 |
| 14 | 8251 |
| 15 | 13198 |
| 16 | 16050 |
| 17 | 47987 |
| 18 | 146191 |
| 19 | 2518028 |
| 20 | 7744270 |
| 21 | 16819386 |