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) |
|---|---|
| 0 | 4 |
| 1 | 9 |
| 2 | 32 |
| 3 | 125 |
| 4 | 504 |
| 5 | 2058 |
| 6 | 8448 |
| 7 | 34749 |
| 8 | 143000 |
| 9 | 588302 |
| 10 | 2418624 |
| 11 | 9934834 |
| 12 | 40770352 |
| 13 | 167152500 |
| 14 | 684656640 |
| 15 | 2801810205 |
| 16 | 11455885080 |
| 17 | 46801769190 |
| 18 | 191055480000 |
| 19 | 779363066790 |
| 20 | 3177034283280 |
| 21 | 12942655253580 |
| 22 | 52693956656640 |
| 23 | 214412258531250 |
| 24 | 871975203591024 |