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) |
|---|---|
| 2 | 3 |
| 3 | 11 |
| 4 | 19 |
| 5 | 137 |
| 6 | 137 |
| 7 | 1019 |
| 8 | 2143 |
| 9 | 7129 |
| 10 | 7129 |
| 11 | 78167 |
| 12 | 81401 |
| 13 | 1085933 |
| 14 | 1111673 |
| 15 | 1165727 |
| 16 | 2364487 |
| 17 | 41325407 |
| 18 | 41325407 |
| 19 | 796326437 |
| 20 | 809074601 |
| 21 | 812400209 |
| 22 | 822981689 |
| 23 | 19174119571 |
| 24 | 19652175721 |
| 25 | 99554817251 |
| 26 | 100483070801 |