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 | 30 |
| 2 | 240 |
| 3 | 3120 |
| 4 | 16800 |
| 5 | 161040 |
| 6 | 371280 |
| 7 | 1419840 |
| 8 | 2476080 |
| 9 | 6436320 |
| 10 | 20511120 |
| 11 | 28629120 |
| 12 | 69343920 |
| 13 | 115856160 |
| 14 | 147008400 |
| 15 | 229344960 |
| 16 | 418195440 |
| 17 | 714924240 |
| 18 | 844596240 |
| 19 | 1350125040 |
| 20 | 1804229280 |
| 21 | 2073071520 |
| 22 | 3077056320 |
| 23 | 3939040560 |