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 | 14 |
| 2 | 224 |
| 3 | 3360 |
| 4 | 50610 |
| 5 | 759136 |
| 6 | 11390400 |
| 7 | 170855776 |
| 8 | 2562887040 |
| 9 | 38443305390 |
| 10 | 576650336640 |
| 11 | 8649755046240 |
| 12 | 129746337080864 |
| 13 | 1946195056159200 |
| 14 | 29192926013193600 |
| 15 | 437893890197853824 |
| 16 | 6568408355529888210 |
| 17 | 98526125332947516960 |
| 18 | 1477891880032655307360 |