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 | 24 |
| 2 | 216 |
| 3 | 1200 |
| 4 | 4950 |
| 5 | 16632 |
| 6 | 48048 |
| 7 | 123552 |
| 8 | 289575 |
| 9 | 629200 |
| 10 | 1283568 |
| 11 | 2482272 |
| 12 | 4585308 |
| 13 | 8139600 |
| 14 | 13953600 |
| 15 | 23193984 |
| 16 | 37509021 |
| 17 | 59183784 |
| 18 | 91333000 |
| 19 | 138138000 |
| 20 | 205134930 |
| 21 | 299562120 |
| 22 | 430775280 |
| 23 | 610740000 |
| 24 | 854611875 |
| 25 | 1181415456 |
| 26 | 1614834144 |
| 27 | 2184124096 |
| 28 | 2925166200 |