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 | 12 |
| 3 | 648 |
| 4 | 6084 |
| 5 | 30444 |
| 6 | 107376 |
| 7 | 302916 |
| 8 | 732024 |
| 9 | 1576728 |
| 10 | 3111012 |
| 11 | 5724852 |
| 12 | 9952620 |
| 13 | 16509336 |
| 14 | 26321160 |
| 15 | 40567872 |
| 16 | 60724104 |
| 17 | 88605480 |
| 18 | 126413772 |
| 19 | 176788476 |
| 20 | 242874756 |
| 21 | 328359624 |
| 22 | 437553360 |