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 | 1 |
| 3 | 9 |
| 4 | 765 |
| 5 | 765 |
| 6 | 8325 |
| 7 | 8325 |
| 8 | 7757430 |
| 9 | 428547690 |
| 10 | 102764221560 |
| 11 | 694561346985 |
| 12 | 108428872433310 |
| 13 | 379041973928475 |
| 14 | 34628781572140470 |
| 15 | 34628781572140470 |