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 | 21548919483 |
| 2 | 90632826380 |
| 3 | 1771417411016 |
| 4 | 3524434872392 |
| 5 | 4773123705616 |