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 | 5 |
| 3 | 49 |
| 4 | 893 |
| 5 | 30649 |
| 6 | 2030213 |
| 7 | 264198625 |
| 8 | 68180168717 |
| 9 | 35046644401609 |
| 10 | 35958357173552597 |
| 11 | 73714882938928013809 |
| 12 | 302083844634245306686685 |
| 13 | 2475275541582550287356775001 |
| 14 | 40559867144321249927245807932197 |
| 15 | 1329146863668196853655964629931680001 |