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 | 18 |
| 2 | 144 |
| 3 | 672 |
| 4 | 2034 |
| 5 | 4320 |
| 6 | 7392 |
| 7 | 12672 |
| 8 | 22608 |
| 9 | 34802 |
| 10 | 44640 |
| 11 | 60768 |
| 12 | 93984 |
| 13 | 125280 |
| 14 | 141120 |
| 15 | 182400 |
| 16 | 262386 |
| 17 | 317376 |
| 18 | 343536 |
| 19 | 421344 |
| 20 | 557280 |
| 21 | 665280 |
| 22 | 703584 |
| 23 | 800640 |
| 24 | 1068384 |
| 25 | 1256562 |
| 26 | 1234080 |
| 27 | 1421184 |
| 28 | 1851264 |
| 29 | 2034720 |
| 30 | 2057280 |
| 31 | 2338560 |