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 | 21981157633 |
| 1 | 29832636867 |
| 2 | 39232573648 |
| 3 | 42140457481 |
| 4 | 43065796214 |