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 | 28 |
| 3 | 468 |
| 4 | 2688 |
| 5 | 12400 |
| 6 | 37260 |
| 7 | 100548 |
| 8 | 215040 |
| 9 | 454896 |
| 10 | 883900 |
| 11 | 1609300 |
| 12 | 2618496 |
| 13 | 4453488 |
| 14 | 6913900 |
| 15 | 10548900 |
| 16 | 15138816 |
| 17 | 22713088 |
| 18 | 31256604 |
| 19 | 44563284 |
| 20 | 59459200 |
| 21 | 81302760 |
| 22 | 107538508 |
| 23 | 141587908 |
| 24 | 178808832 |
| 25 | 232500000 |
| 26 | 295476220 |
| 27 | 368465760 |