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 | 6 |
| 1 | 72 |
| 2 | 1056 |
| 3 | 18048 |
| 4 | 336384 |
| 5 | 6531072 |
| 6 | 129048576 |
| 7 | 2568388608 |
| 8 | 51267108864 |
| 9 | 1024536870912 |
| 10 | 20484294967296 |
| 11 | 409634359738368 |
| 12 | 8192274877906944 |
| 13 | 163842199023255552 |
| 14 | 3276817592186044416 |
| 15 | 65536140737488355328 |
| 16 | 1310721125899906842624 |