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 | 7 |
| 1 | 73 |
| 2 | 262657 |
| 3 | 18014398643699713 |
| 4 | 5846006549323611672814741748716771307882079584257 |