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 | 2 |
| 2 | 21 |
| 3 | 27 |
| 4 | 123 |
| 5 | 175 |
| 6 | 2133 |
| 7 | 2187 |
| 8 | 6093 |
| 9 | 340917 |
| 10 | 504309 |
| 11 | 1594323 |
| 12 | 1895841 |
| 13 | 5308415 |
| 14 | 23006577 |
| 15 | 62188641 |