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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 24 |
| 5 | 80 |
| 6 | 225 |
| 7 | 546 |
| 8 | 1176 |
| 9 | 2304 |
| 10 | 4185 |
| 11 | 7150 |
| 12 | 11616 |
| 13 | 18096 |
| 14 | 27209 |
| 15 | 39690 |
| 16 | 56400 |
| 17 | 78336 |
| 18 | 106641 |
| 19 | 142614 |
| 20 | 187720 |
| 21 | 243600 |
| 22 | 312081 |
| 23 | 395186 |
| 24 | 495144 |
| 25 | 614400 |
| 26 | 755625 |
| 27 | 921726 |
| 28 | 1115856 |
| 29 | 1341424 |
| 30 | 1602105 |
| 31 | 1901850 |
| 32 | 2244896 |
| 33 | 2635776 |
| 34 | 3079329 |
| 35 | 3580710 |
| 36 | 4145400 |
| 37 | 4779216 |
| 38 | 5488321 |
| 39 | 6279234 |