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 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 720 |
| 6 | 780 |
| 7 | 840 |
| 8 | 1008 |
| 9 | 1092 |
| 10 | 1584 |
| 11 | 2016 |
| 12 | 2520 |
| 13 | 2880 |
| 14 | 3168 |
| 15 | 3360 |
| 16 | 3600 |
| 17 | 4368 |
| 18 | 5640 |
| 19 | 6048 |
| 20 | 6720 |
| 21 | 7560 |
| 22 | 8640 |
| 23 | 8820 |
| 24 | 9520 |
| 25 | 10080 |
| 26 | 11088 |
| 27 | 12240 |
| 28 | 13104 |
| 29 | 13440 |
| 30 | 13860 |
| 31 | 14040 |
| 32 | 15840 |
| 33 | 17160 |
| 34 | 18480 |
| 35 | 18720 |
| 36 | 19320 |
| 37 | 19656 |
| 38 | 20736 |
| 39 | 21840 |
| 40 | 22176 |
| 41 | 22680 |
| 42 | 23040 |