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 | 1 |
| 1 | 30 |
| 2 | 120 |
| 3 | 480 |
| 4 | 1920 |
| 5 | 7680 |
| 6 | 30720 |
| 7 | 122880 |
| 8 | 491520 |
| 9 | 1966080 |
| 10 | 7864320 |
| 11 | 31457280 |
| 12 | 125829120 |
| 13 | 503316480 |
| 14 | 2013265920 |
| 15 | 8053063680 |
| 16 | 32212254720 |
| 17 | 128849018880 |
| 18 | 515396075520 |
| 19 | 2061584302080 |
| 20 | 8246337208320 |
| 21 | 32985348833280 |
| 22 | 131941395333120 |
| 23 | 527765581332480 |