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 | 7 |
| 2 | 17 |
| 3 | 79 |
| 4 | 431 |
| 5 | 58049 |
| 6 | 130783 |
| 7 | 162287 |
| 8 | 523927 |
| 9 | 2486784401 |
| 10 | 6102977801 |
| 11 | 8375575711 |
| 12 | 13055867207 |
| 13 | 83695120256591 |
| 14 | 375700268413577 |
| 15 | 2251799813682647 |
| 16 | 9007199254738183 |
| 17 | 79792265017612001 |
| 18 | 1490116119372884249 |