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 | 43 |
| 3 | 2610 |
| 4 | 312081 |
| 5 | 61825050 |
| 6 | 18318396195 |
| 7 | 7586241152490 |
| 8 | 4184711271725985 |
| 9 | 2965919152834367730 |
| 10 | 2626408950849351178875 |