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 | 0 |
| 2 | 128 |
| 3 | 0 |
| 4 | 2944 |
| 5 | 1024 |
| 6 | 31616 |
| 7 | 15360 |
| 8 | 199424 |
| 9 | 101376 |
| 10 | 877696 |
| 11 | 439296 |
| 12 | 3011200 |
| 13 | 1464320 |
| 14 | 8630144 |
| 15 | 4073472 |
| 16 | 21607936 |
| 17 | 9922560 |
| 18 | 48713856 |
| 19 | 21829632 |
| 20 | 101009792 |
| 21 | 44301312 |
| 22 | 195640192 |
| 23 | 84198400 |
| 24 | 358064384 |