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 | 0 |
| 1 | 1 |
| 2 | 38 |
| 3 | 4443 |
| 4 | 1166876 |
| 5 | 546365045 |
| 6 | 400680904674 |
| 7 | 423859315570607 |
| 8 | 611038907405197432 |
| 9 | 1151555487914640463209 |
| 10 | 2748476184146759127540190 |
| 11 | 8102732939160371170806346243 |
| 12 | 28915133156938367486730067779348 |