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 | 5 |
| 3 | 79 |
| 4 | 445 |
| 5 | 16055 |
| 6 | 27067045 |
| 7 | 1208198549 |
| 8 | 1208198609 |
| 9 | 1208198615 |
| 10 | 2636913002983 |
| 11 | 885992692751479 |
| 12 | 885992692751483 |
| 13 | 885992692751833 |
| 14 | 43525513764815035 |
| 15 | 43525513764815057 |
| 16 | 43525513764815173 |
| 17 | 43525513764816367 |