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 | 1 |
| 2 | 18 |
| 3 | 927 |
| 4 | 94876 |
| 5 | 16251045 |
| 6 | 4210190766 |
| 7 | 1543550310211 |
| 8 | 764096247603480 |
| 9 | 493254380867214249 |
| 10 | 404269328278061434810 |
| 11 | 411862088865696890314311 |
| 12 | 512690851568229926690616948 |
| 13 | 768775988931240685277619894157 |