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 | 1 |
| 2 | 28 |
| 3 | 468 |
| 4 | 1792 |
| 5 | 12400 |
| 6 | 13104 |
| 7 | 100548 |
| 8 | 114688 |
| 9 | 341172 |
| 10 | 347200 |
| 11 | 1609300 |
| 12 | 838656 |
| 13 | 4453488 |
| 14 | 2815344 |
| 15 | 5803200 |
| 16 | 7340032 |
| 17 | 22713088 |
| 18 | 9552816 |
| 19 | 44563284 |
| 20 | 22220800 |
| 21 | 47056464 |
| 22 | 45060400 |
| 23 | 141587908 |
| 24 | 53673984 |
| 25 | 193750000 |
| 26 | 124697664 |
| 27 | 248714388 |
| 28 | 180182016 |
| 29 | 574288624 |
| 30 | 162489600 |