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 | 5 |
| 2 | 35 |
| 3 | 365 |
| 4 | 5990 |
| 5 | 161525 |
| 6 | 7387640 |
| 7 | 586285040 |
| 8 | 82090572095 |
| 9 | 20540291522675 |
| 10 | 9278896006526795 |
| 11 | 7632398133742637255 |
| 12 | 11514756687812563119530 |
| 13 | 32063466203746720003813970 |
| 14 | 165699104606274900865952221145 |