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 | 8 |
| 3 | 134 |
| 4 | 10340 |
| 5 | 3649346 |
| 6 | 6188114528 |
| 7 | 52398157106366 |
| 8 | 2277627698797283420 |
| 9 | 518758596372421679994170 |
| 10 | 628925760908337480420110203736 |
| 11 | 4109478867142143642923124190955500214 |