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 | 15 |
| 3 | 625 |
| 4 | 54335 |
| 5 | 8563601 |
| 6 | 2228419359 |
| 7 | 893451975473 |
| 8 | 523337983164799 |
| 9 | 429463651385469649 |
| 10 | 477364501208149290975 |
| 11 | 699086688951391180496497 |
| 12 | 1318072723102023442664430143 |
| 13 | 3137514636520304660660007679505 |