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 | 2 |
| 2 | 192 |
| 3 | 14632 |
| 4 | 5451140 |
| 5 | 2216555772 |
| 6 | 2201283594512 |
| 7 | 2563699840815752 |
| 8 | 5239330894956743702 |
| 9 | 12738172416005805235262 |
| 10 | 45354957806572334315266802 |
| 11 | 190794310975336315988205573422 |
| 12 | 1056059186013450690759502943569093 |
| 13 | 6805676661977149073551721890947184830 |