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 | 5 |
| 2 | 19 |
| 3 | 71 |
| 4 | 3691 |
| 5 | 191861 |
| 6 | 138907099 |
| 7 | 26947261171 |
| 8 | 436315574686414344004975231616076636245689199862837798457639364993981991744926792179 |