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) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 336 |
| 4 | 11424 |
| 5 | 502656 |
| 6 | 27143424 |
| 7 | 1737179136 |
| 8 | 128551256064 |
| 9 | 10798305509376 |
| 10 | 1015040717881344 |
| 11 | 105564234659659776 |
| 12 | 12034322751201214464 |
| 13 | 1492256021148950593536 |
| 14 | 199962306833959379533824 |
| 15 | 28794572184090150652870656 |
| 16 | 4434364116349883200542081024 |