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 | 0 |
| 2 | 1 |
| 3 | 27 |
| 4 | 282 |
| 5 | 2050 |
| 6 | 12405 |
| 7 | 67557 |
| 8 | 344708 |
| 9 | 1686132 |
| 10 | 8017335 |
| 11 | 37383775 |
| 12 | 171917790 |
| 13 | 782635542 |
| 14 | 3535573769 |
| 15 | 15875062665 |
| 16 | 70921483080 |
| 17 | 315457366696 |