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 | 6 |
| 3 | 14 |
| 4 | 7 |
| 5 | 120 |
| 6 | 248 |
| 7 | 16160 |
| 8 | 1019 |
| 9 | 127 |
| 10 | 32640 |
| 11 | 65408 |
| 12 | 16373 |
| 13 | 8386032 |
| 14 | 4194056 |
| 15 | 4194239 |
| 16 | 32767 |
| 17 | 2147450880 |
| 18 | 4294934528 |
| 19 | 4611672824287851743 |
| 20 | 268435343 |
| 21 | 8796091842564 |
| 22 | 1125899889968159 |
| 23 | 70368744112268 |
| 24 | 70368744161279 |