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 | 17 |
| 3 | 82 |
| 4 | 396 |
| 5 | 1905 |
| 6 | 9165 |
| 7 | 44088 |
| 8 | 212082 |
| 9 | 1020218 |
| 10 | 4907734 |
| 11 | 23608545 |
| 12 | 113568371 |
| 13 | 546318080 |
| 14 | 2628050766 |
| 15 | 12642178765 |
| 16 | 60814914995 |