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 | 2 |
| 2 | 12 |
| 3 | 104 |
| 4 | 1072 |
| 5 | 12192 |
| 6 | 147648 |
| 7 | 1867392 |
| 8 | 24380160 |
| 9 | 326105600 |
| 10 | 4445965312 |
| 11 | 61555599360 |
| 12 | 863154221056 |
| 13 | 12233140576256 |
| 14 | 174954419109888 |
| 15 | 2521749245558784 |
| 16 | 36595543723671552 |
| 17 | 534249057803698176 |