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 | 23 |
| 2 | 229 |
| 3 | 2287 |
| 4 | 22861 |
| 5 | 228601 |
| 6 | 2285981 |
| 7 | 22859783 |
| 8 | 228597829 |
| 9 | 2285978263 |
| 10 | 22859782619 |
| 11 | 228597826159 |
| 12 | 2285978261587 |
| 13 | 22859782615849 |
| 14 | 228597826158469 |
| 15 | 2285978261584687 |
| 16 | 22859782615846861 |
| 17 | 228597826158468593 |
| 18 | 2285978261584685869 |
| 19 | 22859782615846858687 |
| 20 | 228597826158468586843 |