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 | 126 |
| 3 | 421 |
| 4 | 3001 |
| 5 | 5604 |
| 6 | 20393 |
| 7 | 45472 |
| 8 | 102595 |
| 9 | 161277 |
| 10 | 338402 |
| 11 | 489034 |
| 12 | 893944 |
| 13 | 1412682 |
| 14 | 2264545 |
| 15 | 3019845 |
| 16 | 4792281 |
| 17 | 6143391 |
| 18 | 9149646 |
| 19 | 12553350 |
| 20 | 17386054 |
| 21 | 21421963 |
| 22 | 30096986 |
| 23 | 38927373 |
| 24 | 51682575 |
| 25 | 65462507 |
| 26 | 84502439 |
| 27 | 100115923 |