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 | 192 |
| 3 | 15216 |
| 4 | 2249472 |
| 5 | 534437376 |
| 6 | 186227300352 |
| 7 | 89472023771136 |
| 8 | 56685374949752832 |
| 9 | 45789401925385322496 |
| 10 | 45932606279820521766912 |
| 11 | 56019030070478949980307456 |
| 12 | 81629508898089483953705582592 |
| 13 | 140066108036622450865749167702016 |
| 14 | 279529326198310211796977967402319872 |