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 | 216 |
| 2 | 864 |
| 3 | 3456 |
| 4 | 7776 |
| 5 | 31104 |
| 6 | 124416 |
| 7 | 279936 |
| 8 | 497664 |
| 9 | 972000 |
| 10 | 1944000 |
| 11 | 3888000 |
| 12 | 7776000 |
| 13 | 11664000 |
| 14 | 15552000 |
| 15 | 31104000 |
| 16 | 34992000 |
| 17 | 46656000 |
| 18 | 62208000 |
| 19 | 77760000 |
| 20 | 97200000 |
| 21 | 194400000 |
| 22 | 291600000 |
| 23 | 388800000 |
| 24 | 777600000 |
| 25 | 874800000 |
| 26 | 1166400000 |
| 27 | 1555200000 |
| 28 | 3110400000 |
| 29 | 3499200000 |