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 | 5 |
| 3 | 60 |
| 4 | 340 |
| 5 | 1300 |
| 6 | 3885 |
| 7 | 9800 |
| 8 | 21840 |
| 9 | 44280 |
| 10 | 83325 |
| 11 | 147620 |
| 12 | 248820 |
| 13 | 402220 |
| 14 | 627445 |
| 15 | 949200 |
| 16 | 1398080 |
| 17 | 2011440 |
| 18 | 2834325 |
| 19 | 3920460 |
| 20 | 5333300 |
| 21 | 7147140 |
| 22 | 9448285 |
| 23 | 12336280 |
| 24 | 15925200 |
| 25 | 20345000 |
| 26 | 25742925 |
| 27 | 32284980 |
| 28 | 40157460 |
| 29 | 49568540 |
| 30 | 60749925 |
| 31 | 73958560 |
| 32 | 89478400 |