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 | 3 |
| 2 | 16 |
| 3 | 116 |
| 4 | 1016 |
| 5 | 10176 |
| 6 | 113216 |
| 7 | 1375456 |
| 8 | 18047296 |
| 9 | 253815936 |
| 10 | 3805221376 |
| 11 | 60558070016 |
| 12 | 1019617312256 |
| 13 | 18111737604096 |
| 14 | 338602832961536 |
| 15 | 6648048064792576 |
| 16 | 136810876329865216 |
| 17 | 2945671077411987456 |