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) |
|---|---|
| 2 | 5 |
| 3 | 11 |
| 4 | 25 |
| 5 | 55 |
| 6 | 125 |
| 7 | 277 |
| 8 | 637 |
| 9 | 1421 |
| 10 | 3237 |
| 11 | 7553 |
| 12 | 16807 |
| 13 | 38661 |
| 14 | 90209 |
| 15 | 208397 |