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 | 128 |
| 2 | 2816 |
| 3 | 27008 |
| 4 | 157184 |
| 5 | 658048 |
| 6 | 2187520 |
| 7 | 6140800 |
| 8 | 15158272 |
| 9 | 33830016 |
| 10 | 69629696 |
| 11 | 134110592 |
| 12 | 244396544 |
| 13 | 425000576 |
| 14 | 710003968 |
| 15 | 1145628544 |
| 16 | 1793234944 |
| 17 | 2732779648 |
| 18 | 4066763520 |
| 19 | 5924704640 |