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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 588 |
| 8 | 3328 |
| 9 | 9720 |
| 10 | 27600 |
| 11 | 59048 |
| 12 | 124992 |
| 13 | 226460 |
| 14 | 408464 |
| 15 | 666900 |
| 16 | 1086464 |
| 17 | 1650768 |
| 18 | 2505168 |
| 19 | 3610000 |
| 20 | 5198400 |
| 21 | 7191828 |
| 22 | 9945232 |
| 23 | 13320220 |
| 24 | 17835264 |
| 25 | 23265000 |
| 26 | 30341584 |
| 27 | 38718648 |
| 28 | 49401408 |
| 29 | 61880780 |
| 30 | 77504400 |
| 31 | 95550308 |
| 32 | 117788672 |
| 33 | 143225280 |
| 34 | 174144464 |
| 35 | 209210400 |
| 36 | 251325504 |
| 37 | 298732228 |
| 38 | 355068048 |
| 39 | 418062060 |
| 40 | 492217600 |