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 | 4 |
| 2 | 76 |
| 3 | 439204 |
| 4 | 84722519070079276 |
| 5 | 608130213374088941214747405817720942127490792974404 |