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 | 1 |
| 2 | 1 |
| 3 | 13 |
| 4 | 133 |
| 5 | 3631 |
| 6 | 172082 |
| 7 | 16566199 |
| 8 | 3057290265 |
| 9 | 1105411581741 |
| 10 | 776531523355217 |
| 11 | 1063228770141145384 |
| 12 | 2834013489992345694498 |
| 13 | 14712337761578682394367473 |
| 14 | 148727865257442275211424889367 |