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 | 400 |
| 5 | 14024 |
| 6 | 86608 |
| 7 | 285048 |
| 8 | 668176 |
| 9 | 1272720 |
| 10 | 2110944 |
| 11 | 3180724 |
| 12 | 4475176 |
| 13 | 5989600 |
| 14 | 7722744 |
| 15 | 9674608 |
| 16 | 11845192 |
| 17 | 14234496 |
| 18 | 16842520 |
| 19 | 19669264 |
| 20 | 22714728 |
| 21 | 25978912 |
| 22 | 29461816 |
| 23 | 33163440 |
| 24 | 37083784 |
| 25 | 41222848 |
| 26 | 45580632 |
| 27 | 50157136 |
| 28 | 54952360 |