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 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 4 |
| 9 | 0 |
| 10 | 0 |
| 11 | 16 |
| 12 | 40 |
| 13 | 0 |
| 14 | 0 |
| 15 | 194 |
| 16 | 274 |
| 17 | 0 |
| 18 | 0 |
| 19 | 2384 |
| 20 | 4719 |
| 21 | 0 |
| 22 | 0 |
| 23 | 31856 |
| 24 | 62124 |
| 25 | 0 |
| 26 | 0 |
| 27 | 426502 |
| 28 | 817717 |
| 29 | 0 |
| 30 | 0 |
| 31 | 5724640 |
| 32 | 10838471 |
| 33 | 0 |
| 34 | 0 |
| 35 | 75178742 |
| 36 | 142349245 |
| 37 | 0 |
| 38 | 0 |
| 39 | 977964587 |
| 40 | 1850941916 |
| 41 | 0 |
| 42 | 0 |