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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 6 |
| 10 | 36 |
| 11 | 150 |
| 12 | 464 |
| 13 | 1304 |
| 14 | 3349 |
| 15 | 8213 |
| 16 | 19230 |
| 17 | 43867 |
| 18 | 97644 |
| 19 | 213776 |
| 20 | 461240 |
| 21 | 984603 |
| 22 | 2082436 |