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 | 12 |
| 3 | 24 |
| 4 | 60 |
| 5 | 84 |
| 6 | 120 |
| 7 | 240 |
| 8 | 360 |
| 9 | 420 |
| 10 | 672 |
| 11 | 840 |
| 12 | 1260 |
| 13 | 1680 |
| 14 | 2160 |
| 15 | 2520 |
| 16 | 3360 |
| 17 | 6720 |
| 18 | 7560 |
| 19 | 10080 |
| 20 | 15120 |
| 21 | 21840 |
| 22 | 27720 |
| 23 | 30240 |
| 24 | 50400 |
| 25 | 60480 |
| 26 | 65520 |
| 27 | 83160 |
| 28 | 98280 |
| 29 | 110880 |
| 30 | 131040 |