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 | 0 |
| 1 | 288 |
| 2 | 2400 |
| 3 | 9408 |
| 4 | 25920 |
| 5 | 58080 |
| 6 | 113568 |
| 7 | 201600 |
| 8 | 332928 |
| 9 | 519840 |
| 10 | 776160 |
| 11 | 1117248 |
| 12 | 1560000 |
| 13 | 2122848 |
| 14 | 2825760 |
| 15 | 3690240 |
| 16 | 4739328 |
| 17 | 5997600 |
| 18 | 7491168 |
| 19 | 9247680 |
| 20 | 11296320 |
| 21 | 13667808 |
| 22 | 16394400 |
| 23 | 19509888 |
| 24 | 23049600 |
| 25 | 27050400 |
| 26 | 31550688 |
| 27 | 36590400 |
| 28 | 42211008 |
| 29 | 48455520 |