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 | 6 |
| 4 | 208 |
| 5 | 600 |
| 6 | 3252 |
| 7 | 10584 |
| 8 | 27584 |
| 9 | 61992 |
| 10 | 125300 |
| 11 | 233772 |
| 12 | 409584 |
| 13 | 682084 |
| 14 | 1089172 |
| 15 | 1678800 |
| 16 | 2510592 |
| 17 | 3657584 |
| 18 | 5208084 |
| 19 | 7267652 |
| 20 | 9961200 |
| 21 | 13435212 |
| 22 | 17860084 |
| 23 | 23432584 |
| 24 | 30378432 |
| 25 | 38955000 |
| 26 | 49454132 |
| 27 | 62205084 |