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 | 7 |
| 3 | 2793 |
| 4 | 173302857 |
| 5 | 3257420083394841 |
| 6 | 30572436265385693946286383 |
| 7 | 213701173947351299768327343802342830897 |
| 8 | 1552400172652063971265258662606880393824188151866063025 |