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 | 6 |
| 2 | 19 |
| 3 | 67 |
| 4 | 232 |
| 5 | 735 |
| 6 | 2090 |
| 7 | 5371 |
| 8 | 12645 |
| 9 | 27639 |
| 10 | 56726 |
| 11 | 110334 |
| 12 | 204903 |
| 13 | 365538 |
| 14 | 629531 |
| 15 | 1050952 |
| 16 | 1706538 |
| 17 | 2703140 |
| 18 | 4187021 |
| 19 | 6355333 |
| 20 | 9470138 |
| 21 | 13875377 |
| 22 | 20017232 |
| 23 | 28468369 |
| 24 | 39956595 |
| 25 | 55398509 |
| 26 | 75938776 |
| 27 | 102995704 |
| 28 | 138313857 |
| 29 | 184024492 |