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 | 144 |
| 7 | 392 |
| 8 | 896 |
| 9 | 1620 |
| 10 | 2800 |
| 11 | 4356 |
| 12 | 6624 |
| 13 | 9464 |
| 14 | 13328 |
| 15 | 18000 |
| 16 | 24064 |
| 17 | 31212 |
| 18 | 40176 |
| 19 | 50540 |
| 20 | 63200 |
| 21 | 77616 |
| 22 | 94864 |
| 23 | 114264 |
| 24 | 137088 |
| 25 | 162500 |
| 26 | 191984 |
| 27 | 224532 |
| 28 | 261856 |
| 29 | 302760 |
| 30 | 349200 |
| 31 | 399776 |
| 32 | 456704 |
| 33 | 518364 |
| 34 | 587248 |
| 35 | 661500 |
| 36 | 743904 |
| 37 | 832352 |
| 38 | 929936 |
| 39 | 1034280 |
| 40 | 1148800 |