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) |
|---|---|
| 6 | 1 |
| 7 | 15 |
| 8 | 122 |
| 9 | 715 |
| 10 | 3388 |
| 11 | 13817 |
| 12 | 50439 |
| 13 | 169324 |
| 14 | 533115 |
| 15 | 1597981 |
| 16 | 4613544 |
| 17 | 12948083 |
| 18 | 35582783 |
| 19 | 96296410 |
| 20 | 257763847 |
| 21 | 684721291 |
| 22 | 1809437921 |
| 23 | 4765066652 |
| 24 | 12520359325 |
| 25 | 32850638623 |
| 26 | 86116228859 |
| 27 | 225627072434 |