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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 46 |
| 6 | 394 |
| 7 | 978 |
| 8 | 2586 |
| 9 | 2811 |
| 10 | 2968 |
| 11 | 3642 |
| 12 | 4827 |
| 13 | 4918 |
| 14 | 5592 |
| 15 | 5706 |
| 16 | 10683 |
| 17 | 12891 |
| 18 | 14118 |
| 19 | 74350 |
| 20 | 88680 |
| 21 | 162138 |
| 22 | 279978 |