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 | 4 |
| 3 | 8 |
| 4 | 112 |
| 5 | 10528 |
| 6 | 3916416 |
| 7 | 453977888 |
| 8 | 5984725643520 |
| 9 | 24757413551258752 |
| 10 | 36544913291284069002240 |
| 11 | 3209228105587401803500707840 |
| 12 | 206085396642453387914503205007360 |