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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 2 |
| 8 | 0 |
| 9 | 0 |
| 10 | 4 |
| 11 | 4 |
| 12 | 4 |
| 13 | 4 |
| 14 | 0 |
| 15 | 20 |
| 16 | 6 |
| 17 | 16 |
| 18 | 12 |
| 19 | 10 |
| 20 | 0 |
| 21 | 84 |
| 22 | 40 |
| 23 | 74 |
| 24 | 42 |
| 25 | 66 |
| 26 | 38 |
| 27 | 22 |
| 28 | 254 |
| 29 | 238 |
| 30 | 188 |
| 31 | 356 |
| 32 | 242 |
| 33 | 272 |
| 34 | 150 |
| 35 | 148 |
| 36 | 1140 |
| 37 | 1058 |
| 38 | 1208 |
| 39 | 1546 |
| 40 | 1288 |