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 | 0 |
| 1 | 10 |
| 2 | 136 |
| 3 | 1378 |
| 4 | 12880 |
| 5 | 117370 |
| 6 | 1060696 |
| 7 | 9559378 |
| 8 | 86073760 |
| 9 | 774781930 |
| 10 | 6973391656 |
| 11 | 62761587778 |
| 12 | 564857478640 |
| 13 | 5083726873690 |
| 14 | 45753570561016 |
| 15 | 411782221142578 |
| 16 | 3706040248563520 |
| 17 | 33354363011912650 |
| 18 | 300189269431736776 |
| 19 | 2701703431859199778 |