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 | 2 |
| 2 | 4 |
| 3 | 26 |
| 4 | 18 |
| 5 | 482 |
| 6 | 266 |
| 7 | 6050 |
| 8 | 3114 |
| 9 | 21122 |
| 10 | 10730 |
| 11 | 22178 |
| 12 | 11226 |
| 13 | 4455362 |
| 14 | 2256338 |
| 15 | 343874 |
| 16 | 173610 |
| 17 | 13643522 |
| 18 | 6869842 |
| 19 | 690621122 |
| 20 | 347772738 |
| 21 | 16250361602 |
| 22 | 8187307306 |
| 23 | 17146915106 |
| 24 | 8584448890 |
| 25 | 720152334722 |
| 26 | 365024665978 |
| 27 | 59381983394 |
| 28 | 29700003082 |