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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 21 |
| 5 | 54 |
| 6 | 137 |
| 7 | 343 |
| 8 | 847 |
| 9 | 2075 |
| 10 | 5031 |
| 11 | 12109 |
| 12 | 28921 |
| 13 | 68633 |
| 14 | 161865 |
| 15 | 379655 |