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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 32 |
| 4 | 1094 |
| 5 | 23055 |
| 6 | 405475 |
| 7 | 6575842 |
| 8 | 102567444 |
| 9 | 1569195485 |
| 10 | 23775369725 |
| 11 | 358461659952 |
| 12 | 5391042181294 |
| 13 | 80974624209115 |
| 14 | 1215462744452775 |
| 15 | 18238484835400862 |
| 16 | 273628186560143144 |
| 17 | 4104820038944901945 |