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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 7 |
| 6 | 1 |
| 7 | 9 |
| 8 | 56 |
| 9 | 142 |
| 10 | 1 |
| 11 | 16 |
| 12 | 207 |
| 13 | 1780 |
| 14 | 5941 |
| 15 | 1 |
| 16 | 25 |
| 17 | 544 |
| 18 | 9342 |
| 19 | 103392 |
| 20 | 428856 |
| 21 | 1 |
| 22 | 36 |
| 23 | 1175 |
| 24 | 32848 |
| 25 | 709893 |
| 26 | 9649124 |
| 27 | 47885899 |
| 28 | 1 |
| 29 | 49 |
| 30 | 2232 |
| 31 | 91150 |
| 32 | 3142528 |
| 33 | 82305144 |
| 34 | 1329514816 |
| 35 | 7685040448 |
| 36 | 1 |
| 37 | 64 |
| 38 | 3871 |
| 39 | 215892 |
| 40 | 10682325 |
| 41 | 440535696 |
| 42 | 13598786979 |
| 43 | 254821480596 |
| 44 | 1681740027657 |