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 | 6 |
| 4 | 14 |
| 5 | 42 |
| 6 | 114 |
| 7 | 602 |
| 8 | 798 |
| 9 | 1806 |
| 10 | 5334 |
| 11 | 34314 |
| 12 | 101346 |
| 13 | 229362 |
| 14 | 4357878 |
| 15 | 9786714 |
| 16 | 12198858 |
| 17 | 168241542 |
| 18 | 185947566 |
| 19 | 231778302 |
| 20 | 524550894 |