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 | 8 |
| 2 | 32 |
| 3 | 168 |
| 4 | 784 |
| 5 | 3840 |
| 6 | 18432 |
| 7 | 89216 |
| 8 | 430336 |
| 9 | 2078720 |
| 10 | 10035200 |
| 11 | 48457728 |
| 12 | 233967616 |
| 13 | 1129709568 |
| 14 | 5454692352 |
| 15 | 26337640448 |
| 16 | 127169265664 |
| 17 | 614027755520 |
| 18 | 2964787822592 |
| 19 | 14315262836736 |