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 | 26 |
| 3 | 318 |
| 4 | 8362 |
| 5 | 518136 |
| 6 | 79762944 |
| 7 | 31347878526 |
| 8 | 31875040276682 |
| 9 | 84415672202652576 |
| 10 | 584440009839756835096 |
| 11 | 10604211348847550536329728 |
| 12 | 505234836942870203845022012928 |
| 13 | 63320076924994011498092218964764672 |
| 14 | 20908605974267058444111310750652481533952 |