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 | 4 |
| 2 | 79 |
| 3 | 3600 |
| 4 | 281571 |
| 5 | 32572756 |
| 6 | 5109144543 |
| 7 | 1027533353168 |
| 8 | 254977173389319 |
| 9 | 75925129079783308 |
| 10 | 26568150968269086211 |
| 11 | 10749154284380665611224 |
| 12 | 4963704194366362387891227 |
| 13 | 2588716234142991968960920692 |
| 14 | 1511548995678989691821551648635 |