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 | 13 |
| 2 | 283 |
| 3 | 8667 |
| 4 | 342969 |
| 5 | 16671885 |
| 6 | 962672355 |
| 7 | 64467073755 |
| 8 | 4917699360945 |
| 9 | 421377918441165 |
| 10 | 40104072098340075 |
| 11 | 4200511400073848475 |
| 12 | 480454695780380469225 |
| 13 | 59617988532820945752525 |
| 14 | 7980059238850231812954675 |
| 15 | 1146519564522299271411982875 |