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 | 108 |
| 4 | 528 |
| 5 | 1674 |
| 6 | 4104 |
| 7 | 8622 |
| 8 | 16206 |
| 9 | 28332 |
| 10 | 46200 |
| 11 | 71484 |
| 12 | 106746 |
| 13 | 153552 |
| 14 | 214860 |
| 15 | 293166 |
| 16 | 391470 |
| 17 | 512592 |
| 18 | 660546 |
| 19 | 840840 |
| 20 | 1054704 |
| 21 | 1308696 |
| 22 | 1606776 |