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 | 3 |
| 3 | 11 |
| 4 | 44 |
| 5 | 198 |
| 6 | 1036 |
| 7 | 6346 |
| 8 | 45019 |
| 9 | 364039 |
| 10 | 3306553 |
| 11 | 33328389 |
| 12 | 369132782 |
| 13 | 4456043300 |
| 14 | 58230679722 |
| 15 | 818965960156 |
| 16 | 12334276322245 |
| 17 | 198059886271741 |
| 18 | 3377876368962559 |
| 19 | 60978094460613103 |
| 20 | 1161619710523459392 |