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 | 0 |
| 2 | 3 |
| 3 | 62 |
| 4 | 3816 |
| 5 | 758338 |
| 6 | 488491106 |
| 7 | 1019565752074 |
| 8 | 6897694015722898 |
| 9 | 151249886315100454600 |
| 10 | 10749578188598491367494716 |