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 | 7 |
| 3 | 91 |
| 4 | 1899 |
| 5 | 57876 |
| 6 | 2447115 |
| 7 | 139777303 |
| 8 | 10629219251 |
| 9 | 1066463205220 |
| 10 | 140409644914798 |
| 11 | 24185696469330452 |
| 12 | 5439617764120907676 |
| 13 | 1594552369099740836202 |
| 14 | 608364562372792302094447 |