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 | 81 |
| 2 | 1728 |
| 3 | 15552 |
| 4 | 136080 |
| 5 | 1125360 |
| 6 | 9093528 |
| 7 | 72081792 |
| 8 | 563173128 |
| 9 | 4349328912 |
| 10 | 33272350344 |
| 11 | 252534743280 |
| 12 | 1904015932416 |
| 13 | 14274182767248 |
| 14 | 106487231224248 |
| 15 | 791006745522096 |
| 16 | 5853579437553624 |
| 17 | 43172409083833728 |
| 18 | 317460508504648992 |