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 | 256 |
| 2 | 6817 |
| 3 | 397442 |
| 4 | 6162243 |
| 5 | 220521124 |
| 6 | 1036251845 |
| 7 | 8012009286 |
| 8 | 24995572327 |
| 9 | 103306557608 |
| 10 | 603552970569 |
| 11 | 1456444008010 |
| 12 | 4968923461931 |
| 13 | 12953848691052 |
| 14 | 24642048968653 |
| 15 | 48453335630414 |
| 16 | 110713026041775 |
| 17 | 257543463646096 |
| 18 | 449250776643377 |
| 19 | 855318454200018 |