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) |
|---|---|
| 2 | 15 |
| 3 | 65 |
| 4 | 175 |
| 5 | 9963 |
| 6 | 5368 |
| 7 | 1105000 |
| 8 | 5720625 |
| 9 | 105686875 |
| 10 | 75492928 |
| 11 | 74269960128 |
| 12 | 56445795000 |
| 13 | 96454009575000 |
| 14 | 76498373160000 |
| 15 | 61692439558464 |
| 16 | 403805999193597 |
| 17 | 1643804692663258125 |
| 18 | 1377243480733120000 |