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 | 128 |
| 2 | 76544 |
| 3 | 2372890624 |
| 4 | 390491792890623 |
| 5 | 2083234733888734218749 |
| 6 | 18962123650219836035505781245 |