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) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 15 |
| 3 | 24 |
| 4 | 40 |
| 5 | 60 |
| 6 | 144 |
| 7 | 120 |
| 8 | 180 |
| 9 | 336 |
| 10 | 420 |
| 11 | 360 |
| 12 | 900 |
| 13 | 960 |
| 14 | 720 |
| 15 | 840 |
| 16 | 1260 |
| 17 | 1440 |
| 18 | 2340 |
| 19 | 1680 |
| 20 | 2880 |
| 21 | 3600 |
| 22 | 8190 |
| 23 | 2520 |
| 24 | 9072 |
| 25 | 9900 |
| 26 | 6300 |
| 27 | 6720 |
| 28 | 20592 |
| 29 | 5040 |
| 30 | 10920 |
| 31 | 7560 |
| 32 | 31320 |
| 33 | 98040 |
| 34 | 25920 |
| 35 | 10080 |
| 36 | 21420 |
| 37 | 177156 |
| 38 | 74256 |
| 39 | 15120 |
| 40 | 28560 |
| 41 | 20160 |