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 | 12 |
| 6 | 24 |
| 7 | 30 |
| 8 | 48 |
| 9 | 60 |
| 10 | 120 |
| 11 | 210 |
| 12 | 240 |
| 13 | 420 |
| 14 | 840 |
| 15 | 1680 |
| 16 | 3360 |
| 17 | 6720 |
| 18 | 9240 |
| 19 | 13440 |
| 20 | 18480 |
| 21 | 26880 |
| 22 | 36960 |
| 23 | 73920 |
| 24 | 147840 |
| 25 | 240240 |
| 26 | 295680 |
| 27 | 480480 |
| 28 | 591360 |
| 29 | 960960 |
| 30 | 1921920 |
| 31 | 3843840 |
| 32 | 7687680 |
| 33 | 15375360 |
| 34 | 30750720 |
| 35 | 32672640 |
| 36 | 61501440 |
| 37 | 65345280 |
| 38 | 123002880 |
| 39 | 130690560 |