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 | 12 |
| 2 | 144 |
| 3 | 720 |
| 4 | 2400 |
| 5 | 6300 |
| 6 | 14112 |
| 7 | 28224 |
| 8 | 51840 |
| 9 | 89100 |
| 10 | 145200 |
| 11 | 226512 |
| 12 | 340704 |
| 13 | 496860 |
| 14 | 705600 |
| 15 | 979200 |
| 16 | 1331712 |
| 17 | 1779084 |
| 18 | 2339280 |
| 19 | 3032400 |
| 20 | 3880800 |
| 21 | 4909212 |
| 22 | 6144864 |
| 23 | 7617600 |
| 24 | 9360000 |
| 25 | 11407500 |
| 26 | 13798512 |
| 27 | 16574544 |
| 28 | 19780320 |
| 29 | 23463900 |