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 | 7 |
| 3 | 91 |
| 4 | 1261 |
| 5 | 17557 |
| 6 | 244531 |
| 7 | 3405871 |
| 8 | 47437657 |
| 9 | 660721321 |
| 10 | 9202660831 |
| 11 | 128176530307 |
| 12 | 1785268763461 |
| 13 | 24865586158141 |
| 14 | 346332937450507 |
| 15 | 4823795538148951 |
| 16 | 67186804596634801 |
| 17 | 935791468814738257 |
| 18 | 13033893758809700791 |
| 19 | 181538721154521072811 |
| 20 | 2528508202404485318557 |