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 | 66 |
| 6 | 86 |
| 7 | 230 |
| 8 | 2006 |
| 9 | 3876 |
| 10 | 3920 |
| 11 | 5418 |
| 12 | 8820 |
| 13 | 11900 |
| 14 | 16669 |
| 15 | 19446 |
| 16 | 28243 |
| 17 | 33408 |
| 18 | 37919 |
| 19 | 40595 |