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) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 14 |
| 4 | 870 |
| 5 | 18796230 |
| 6 | 28634752793916486 |
| 7 | 187118328452563149209991044344449606 |
| 8 | 22533823529098462258163079522899558179092788838542277982316450977506091590 |