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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 30 |
| 6 | 6 |
| 7 | 84 |
| 8 | 120 |
| 9 | 180 |
| 10 | 210 |
| 11 | 4620 |
| 12 | 4620 |
| 13 | 780 |
| 14 | 360360 |
| 15 | 360360 |
| 16 | 240240 |
| 17 | 92820 |
| 18 | 12252240 |
| 19 | 175560 |
| 20 | 58198140 |
| 21 | 116396280 |
| 22 | 360360 |
| 23 | 753480 |
| 24 | 2677114440 |
| 25 | 13385572200 |
| 26 | 26771144400 |
| 27 | 40156716600 |
| 28 | 2677114440 |
| 29 | 13665960 |
| 30 | 2329089562800 |
| 31 | 82990547640 |
| 32 | 48134517631200 |