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 | 3 |
| 3 | 7 |
| 4 | 23 |
| 5 | 121 |
| 6 | 21 |
| 7 | 173 |
| 8 | 1597 |
| 9 | 17927 |
| 10 | 127469 |
| 11 | 129317 |
| 12 | 43619 |
| 13 | 44081 |
| 14 | 44521 |
| 15 | 1033223 |
| 16 | 13538159 |
| 17 | 395369371 |
| 18 | 132680013 |
| 19 | 400467919 |
| 20 | 402757063 |
| 21 | 1214947859 |
| 22 | 1221110939 |
| 23 | 50305908619 |
| 24 | 50529880549 |
| 25 | 101470376303 |
| 26 | 509322834499 |
| 27 | 8691337402883 |