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 | 264 |
| 2 | 270864 |
| 3 | 15589728 |
| 4 | 277365792 |
| 5 | 2578126320 |
| 6 | 15995060928 |
| 7 | 74573467584 |
| 8 | 284022573120 |
| 9 | 920557851048 |
| 10 | 2645157604320 |
| 11 | 6847480097568 |
| 12 | 16379004749184 |
| 13 | 36394641851568 |
| 14 | 76512377741184 |
| 15 | 152243515448640 |
| 16 | 290839114879104 |
| 17 | 532222389723024 |
| 18 | 944492355175248 |