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 | 331 |
| 2 | 39139 |
| 3 | 253243 |
| 4 | 4397207 |
| 5 | 21587171 |
| 6 | 781712537 |
| 7 | 781712537 |
| 8 | 25467966877 |
| 9 | 1304374210679 |
| 10 | 4331892405391 |