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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 3 |
| 6 | 5 |
| 7 | 0 |
| 8 | 0 |
| 9 | 23 |
| 10 | 40 |
| 11 | 0 |
| 12 | 0 |
| 13 | 221 |
| 14 | 397 |
| 15 | 0 |
| 16 | 0 |
| 17 | 2410 |
| 18 | 4441 |
| 19 | 0 |
| 20 | 0 |
| 21 | 28460 |
| 22 | 53222 |
| 23 | 0 |
| 24 | 0 |
| 25 | 353743 |
| 26 | 668273 |
| 27 | 0 |
| 28 | 0 |
| 29 | 4559828 |
| 30 | 8679280 |
| 31 | 0 |
| 32 | 0 |
| 33 | 60400688 |
| 34 | 115633260 |
| 35 | 0 |
| 36 | 0 |
| 37 | 817175698 |
| 38 | 1571588177 |
| 39 | 0 |
| 40 | 0 |
| 41 | 11243980807 |
| 42 | 21704569869 |
| 43 | 0 |
| 44 | 0 |
| 45 | 156860869714 |