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 | 8 |
| 2 | 168 |
| 3 | 5120 |
| 4 | 190120 |
| 5 | 7964208 |
| 6 | 362370624 |
| 7 | 17532536736 |
| 8 | 889716433320 |
| 9 | 46887220540160 |
| 10 | 2546408317827088 |
| 11 | 141659449976239104 |
| 12 | 8033749056463329472 |
| 13 | 462687411167492828000 |
| 14 | 26980019699392099317600 |
| 15 | 1589091557661690119997120 |
| 16 | 94361786346423775855372200 |