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 | 68 |
| 4 | 4688 |
| 5 | 21977408 |
| 6 | 483006462403088 |
| 7 | 233295242723145661671791940368 |
| 8 | 54426670277251448804881298598338033107084297639402489952768 |