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 | 4 |
| 3 | 12 |
| 4 | 16 |
| 5 | 36 |
| 6 | 48 |
| 7 | 144 |
| 8 | 240 |
| 9 | 576 |
| 10 | 720 |
| 11 | 1680 |
| 12 | 2880 |
| 13 | 3600 |
| 14 | 5040 |
| 15 | 11520 |
| 16 | 14400 |
| 17 | 15120 |
| 18 | 20160 |
| 19 | 25200 |
| 20 | 45360 |
| 21 | 55440 |
| 22 | 80640 |
| 23 | 100800 |
| 24 | 166320 |
| 25 | 176400 |
| 26 | 226800 |
| 27 | 277200 |
| 28 | 498960 |
| 29 | 720720 |
| 30 | 887040 |
| 31 | 1108800 |
| 32 | 1587600 |
| 33 | 1940400 |
| 34 | 2494800 |
| 35 | 3603600 |
| 36 | 6486480 |
| 37 | 9979200 |
| 38 | 11531520 |
| 39 | 14414400 |