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 | 6 |
| 3 | 60 |
| 4 | 420 |
| 5 | 630 |
| 6 | 5460 |
| 7 | 8190 |
| 8 | 16632 |
| 9 | 64260 |
| 10 | 143640 |
| 11 | 172900 |
| 12 | 598500 |
| 13 | 716625 |
| 14 | 790398 |
| 15 | 791700 |
| 16 | 1182384 |
| 17 | 1187550 |
| 18 | 1530144 |
| 19 | 2708160 |
| 20 | 4277448 |
| 21 | 5314680 |
| 22 | 6284250 |
| 23 | 6397300 |
| 24 | 6741630 |
| 25 | 14619150 |
| 26 | 15214500 |
| 27 | 22144500 |
| 28 | 24315984 |
| 29 | 87966648 |
| 30 | 93284100 |
| 31 | 161670600 |
| 32 | 165197760 |
| 33 | 232517250 |