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 | 0 |
| 1 | 1 |
| 2 | 192 |
| 3 | 4374 |
| 4 | 40960 |
| 5 | 234375 |
| 6 | 979776 |
| 7 | 3294172 |
| 8 | 9437184 |
| 9 | 23914845 |
| 10 | 55000000 |
| 11 | 116923026 |
| 12 | 232906752 |
| 13 | 439239619 |
| 14 | 790601280 |
| 15 | 1366875000 |
| 16 | 2281701376 |
| 17 | 3693048057 |
| 18 | 5816090304 |
| 19 | 8938717390 |
| 20 | 13440000000 |
| 21 | 19811973951 |
| 22 | 28685115712 |
| 23 | 40857905364 |
| 24 | 57330892800 |