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 | 720 |
| 2 | 710998587804863451854045647463724949736497978881168458687447040000000000000 |
| 3 | 71569457046263802294811533723186532165584657342365752577109445058227039255480148842668944867280814080000000000000000000 |