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 | 4 |
| 2 | 24 |
| 3 | 72 |
| 4 | 144 |
| 5 | 432 |
| 6 | 504 |
| 7 | 1008 |
| 8 | 1512 |
| 9 | 3528 |
| 10 | 3024 |
| 11 | 7056 |
| 12 | 5544 |
| 13 | 14112 |
| 14 | 11088 |
| 15 | 13104 |
| 16 | 16632 |
| 17 | 26208 |
| 18 | 36288 |
| 19 | 63504 |
| 20 | 33264 |
| 21 | 68544 |
| 22 | 77616 |
| 23 | 127008 |
| 24 | 66528 |
| 25 | 154224 |
| 26 | 155232 |
| 27 | 209664 |
| 28 | 133056 |
| 29 | 222768 |
| 30 | 144144 |
| 31 | 301392 |
| 32 | 216216 |
| 33 | 853776 |
| 34 | 288288 |
| 35 | 471744 |
| 36 | 399168 |
| 37 | 825552 |
| 38 | 698544 |
| 39 | 1707552 |
| 40 | 432432 |