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 | 2 |
| 2 | 9 |
| 3 | 4 |
| 4 | 12 |
| 5 | 24 |
| 6 | 185 |
| 7 | 114 |
| 8 | 1649 |
| 9 | 692 |
| 10 | 4977 |
| 11 | 1412 |
| 12 | 416345 |
| 13 | 22624 |
| 14 | 72233 |
| 15 | 199892 |
| 16 | 25262152 |
| 17 | 1351880 |
| 18 | 130824185 |
| 19 | 16305324 |
| 20 | 1688906313 |
| 21 | 9412730 |
| 22 | 10393378914 |
| 23 | 721753400 |