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 | 16 |
| 2 | 68 |
| 3 | 256 |
| 4 | 777 |
| 5 | 2160 |
| 6 | 5460 |
| 7 | 13056 |
| 8 | 29482 |
| 9 | 63952 |
| 10 | 133456 |
| 11 | 270080 |
| 12 | 531091 |
| 13 | 1019424 |
| 14 | 1913156 |
| 15 | 3520512 |
| 16 | 6360765 |
| 17 | 11305488 |
| 18 | 19789160 |
| 19 | 34159616 |
| 20 | 58201535 |