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 | 1 |
| 1 | 4 |
| 2 | 12 |
| 3 | 28 |
| 4 | 60 |
| 5 | 124 |
| 6 | 252 |
| 7 | 508 |
| 8 | 1020 |
| 9 | 2044 |
| 10 | 4092 |
| 11 | 8188 |
| 12 | 16380 |
| 13 | 32764 |
| 14 | 65532 |
| 15 | 131068 |