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 | 513 |
| 3 | 47169 |
| 4 | 1775169 |
| 5 | 37712169 |
| 6 | 534505257 |
| 7 | 5587534953 |
| 8 | 46011772521 |
| 9 | 312480135396 |
| 10 | 1809674119396 |
| 11 | 9165388162788 |
| 12 | 41395684407012 |
| 13 | 169328324418084 |
| 14 | 635173167426084 |
| 15 | 2207399512578084 |
| 16 | 7167715400927268 |
| 17 | 21902130296812161 |
| 18 | 63361228916945025 |
| 19 | 174437774859945025 |