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 | 0 |
| 2 | 24 |
| 3 | 840 |
| 4 | 28560 |
| 5 | 970224 |
| 6 | 32959080 |
| 7 | 1119638520 |
| 8 | 38034750624 |
| 9 | 1292061882720 |
| 10 | 43892069261880 |
| 11 | 1491038293021224 |
| 12 | 50651409893459760 |
| 13 | 1720656898084610640 |
| 14 | 58451683124983302024 |
| 15 | 1985636569351347658200 |
| 16 | 67453191674820837076800 |
| 17 | 2291422880374557112953024 |