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 | 8 |
| 2 | 56 |
| 3 | 464 |
| 4 | 3520 |
| 5 | 27768 |
| 6 | 217316 |
| 7 | 1719616 |
| 8 | 13633972 |
| 9 | 108620060 |
| 10 | 867750412 |
| 11 | 6952901716 |
| 12 | 55838915036 |
| 13 | 449398552664 |
| 14 | 3623393504692 |
| 15 | 29262315259524 |