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 | 2 |
| 7 | 1 |
| 8 | 6 |
| 9 | 5 |
| 10 | 26 |
| 11 | 17 |
| 12 | 69 |
| 13 | 50 |
| 14 | 235 |
| 15 | 159 |
| 16 | 693 |
| 17 | 470 |
| 18 | 2142 |
| 19 | 1399 |
| 20 | 6350 |
| 21 | 4086 |
| 22 | 19273 |