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 | 24 |
| 2 | 216 |
| 3 | 3000 |
| 4 | 16464 |
| 5 | 159720 |
| 6 | 369096 |
| 7 | 1414944 |
| 8 | 2469240 |
| 9 | 6424176 |
| 10 | 20486760 |
| 11 | 28599360 |
| 12 | 69293304 |
| 13 | 115787280 |
| 14 | 146928936 |
| 15 | 229241184 |
| 16 | 418046616 |
| 17 | 714718920 |
| 18 | 844369320 |
| 19 | 1349824344 |
| 20 | 1803871440 |
| 21 | 2072682576 |
| 22 | 3076563360 |
| 23 | 3938468856 |