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 | 4 |
| 3 | 18 |
| 4 | 80 |
| 5 | 200 |
| 6 | 468 |
| 7 | 882 |
| 8 | 1600 |
| 9 | 2592 |
| 10 | 4100 |
| 11 | 6050 |
| 12 | 8784 |
| 13 | 12168 |
| 14 | 16660 |
| 15 | 22050 |
| 16 | 28928 |
| 17 | 36992 |
| 18 | 46980 |
| 19 | 58482 |
| 20 | 72400 |
| 21 | 88200 |
| 22 | 106964 |
| 23 | 128018 |
| 24 | 152640 |
| 25 | 180000 |