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 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 12 |
| 5 | 15 |
| 6 | 24 |
| 7 | 25 |
| 8 | 30 |
| 9 | 80 |
| 10 | 420 |
| 11 | 1860 |
| 12 | 146340 |
| 13 | 292680 |
| 14 | 3031080 |
| 15 | 6355440 |
| 16 | 202025100 |
| 17 | 404050200 |
| 18 | 674215920 |
| 19 | 1309133280 |
| 20 | 1759047480 |
| 21 | 3141424023360 |
| 22 | 6282848046720 |
| 23 | 19013977277880 |
| 24 | 2604166475512980 |
| 25 | 295127694592600800 |
| 26 | 1528966300926585360 |