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) |
|---|---|
| 0 | 1 |
| 1 | 34 |
| 2 | 7573 |
| 3 | 1222550 |
| 4 | 211351945 |
| 5 | 36012826776 |
| 6 | 6158217253688 |
| 7 | 1052091957273408 |
| 8 | 179788343101980135 |
| 9 | 30721240815429999078 |
| 10 | 5249581929453966097649 |
| 11 | 897032469743945346623442 |
| 12 | 153282416794739031814924079 |
| 13 | 26192460807219455656314349664 |