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 | 2 |
| 3 | 4 |
| 4 | 16 |
| 5 | 36 |
| 6 | 128 |
| 7 | 672 |
| 8 | 4264 |
| 9 | 25044 |
| 10 | 173712 |
| 11 | 1318904 |
| 12 | 11069056 |
| 13 | 96808692 |
| 14 | 927478976 |
| 15 | 9435033872 |
| 16 | 103783608480 |
| 17 | 1195155968388 |