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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 30 |
| 7 | 42 |
| 8 | 56 |
| 9 | 504 |
| 10 | 720 |
| 11 | 990 |
| 12 | 11880 |
| 13 | 17160 |
| 14 | 24024 |
| 15 | 360360 |
| 16 | 524160 |
| 17 | 742560 |
| 18 | 13366080 |
| 19 | 19535040 |
| 20 | 27907200 |
| 21 | 586051200 |
| 22 | 859541760 |
| 23 | 1235591280 |
| 24 | 29654190720 |
| 25 | 43609104000 |
| 26 | 62990928000 |
| 27 | 1700755056000 |
| 28 | 2506375872000 |
| 29 | 3634245014400 |
| 30 | 109027350432000 |
| 31 | 160945136352000 |
| 32 | 234102016512000 |
| 33 | 7725366544896000 |
| 34 | 11420107066368000 |