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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 26 |
| 5 | 94 |
| 6 | 377 |
| 7 | 1639 |
| 8 | 7623 |
| 9 | 38034 |
| 10 | 199338 |
| 11 | 1111816 |
| 12 | 6442481 |
| 13 | 39478219 |
| 14 | 249507483 |
| 15 | 1659172454 |
| 16 | 11321526022 |
| 17 | 80944313164 |
| 18 | 591617080305 |
| 19 | 4514822914133 |
| 20 | 35120998653271 |
| 21 | 284407875530728 |
| 22 | 2342407874087454 |