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 | 768 |
| 3 | 43676 |
| 4 | 4743130 |
| 5 | 364618672 |
| 6 | 28808442502 |
| 7 | 2125185542510 |
| 8 | 153198148096800 |
| 9 | 10739936528121270 |
| 10 | 738599412949227054 |
| 11 | 49945111084852186032 |
| 12 | 3331294312194018084810 |
| 13 | 219599512046978073473186 |
| 14 | 14331641424452867055092544 |
| 15 | 927231520831830806024847178 |