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 | 1 |
| 2 | 17 |
| 3 | 762 |
| 4 | 67772 |
| 5 | 10032208 |
| 6 | 2226273192 |
| 7 | 691431572992 |
| 8 | 286268594755712 |
| 9 | 152365547943819264 |
| 10 | 101361042063083269520 |
| 11 | 82409537565402784477984 |
| 12 | 80397802305461995791664944 |
| 13 | 92692687015689239272783171264 |