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 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 3 |
| 8 | 0 |
| 9 | 1 |
| 10 | 9 |
| 11 | 18 |
| 12 | 6 |
| 13 | 1 |
| 14 | 1 |
| 15 | 420 |
| 16 | 638 |
| 17 | 264 |
| 18 | 77 |
| 19 | 8 |
| 20 | 4 |
| 21 | 367590 |
| 22 | 469675 |
| 23 | 227168 |
| 24 | 57788 |
| 25 | 7712 |
| 26 | 580 |
| 27 | 18 |