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 | 0 |
| 3 | 1208 |
| 4 | 6712 |
| 5 | 17280 |
| 6 | 32520 |
| 7 | 52432 |
| 8 | 77016 |
| 9 | 106272 |
| 10 | 140200 |
| 11 | 178800 |
| 12 | 222072 |
| 13 | 270016 |
| 14 | 322632 |
| 15 | 379920 |
| 16 | 441880 |
| 17 | 508512 |
| 18 | 579816 |
| 19 | 655792 |
| 20 | 736440 |
| 21 | 821760 |
| 22 | 911752 |
| 23 | 1006416 |
| 24 | 1105752 |
| 25 | 1209760 |
| 26 | 1318440 |
| 27 | 1431792 |
| 28 | 1549816 |
| 29 | 1672512 |
| 30 | 1799880 |
| 31 | 1931920 |