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 | 3 |
| 3 | 12 |
| 4 | 60 |
| 5 | 420 |
| 6 | 660 |
| 7 | 4620 |
| 8 | 8580 |
| 9 | 9240 |
| 10 | 60060 |
| 11 | 78540 |
| 12 | 106260 |
| 13 | 157080 |
| 14 | 1021020 |
| 15 | 1381380 |
| 16 | 1492260 |
| 17 | 1806420 |
| 18 | 2762760 |
| 19 | 2984520 |
| 20 | 23483460 |
| 21 | 34321980 |
| 22 | 38798760 |
| 23 | 46966920 |
| 24 | 68643960 |
| 25 | 681020340 |
| 26 | 892371480 |
| 27 | 1848483780 |
| 28 | 1990674840 |
| 29 | 2127962760 |
| 30 | 3226266120 |