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 | 0 |
| 1 | 6 |
| 2 | 120 |
| 3 | 504 |
| 4 | 1320 |
| 5 | 2730 |
| 6 | 4896 |
| 7 | 7980 |
| 8 | 12144 |
| 9 | 17550 |
| 10 | 24360 |
| 11 | 32736 |
| 12 | 42840 |
| 13 | 54834 |
| 14 | 68880 |
| 15 | 85140 |
| 16 | 103776 |
| 17 | 124950 |
| 18 | 148824 |
| 19 | 175560 |
| 20 | 205320 |
| 21 | 238266 |
| 22 | 274560 |
| 23 | 314364 |
| 24 | 357840 |
| 25 | 405150 |
| 26 | 456456 |
| 27 | 511920 |
| 28 | 571704 |
| 29 | 635970 |
| 30 | 704880 |
| 31 | 778596 |
| 32 | 857280 |
| 33 | 941094 |