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 | 6 |
| 2 | 136 |
| 3 | 2016 |
| 4 | 32896 |
| 5 | 523776 |
| 6 | 8390656 |
| 7 | 134209536 |
| 8 | 2147516416 |
| 9 | 34359607296 |
| 10 | 549756338176 |
| 11 | 8796090925056 |
| 12 | 140737496743936 |
| 13 | 2251799780130816 |
| 14 | 36028797153181696 |
| 15 | 576460751766552576 |
| 16 | 9223372039002259456 |