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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 929569 |
| 15 | 102473312 |
| 16 | 6179518784 |
| 17 | 270387409408 |
| 18 | 9612347580288 |
| 19 | 294906281038848 |
| 20 | 8102569802280960 |
| 21 | 204349178312171520 |
| 22 | 4814058618713806080 |
| 23 | 107303318912687001600 |
| 24 | 2285117810799260737536 |
| 25 | 46847474535385018662912 |