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 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 29 |
| 6 | 35 |
| 7 | 340 |
| 8 | 26579 |
| 9 | 390480 |
| 10 | 9514434 |
| 11 | 145963193 |
| 12 | 5474045270 |
| 13 | 87251356528 |
| 14 | 5454606723223 |
| 15 | 182600931998737 |
| 16 | 5059541554893941 |