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 | 4 |
| 4 | 2 |
| 5 | 1 |
| 6 | 12 |
| 7 | 44 |
| 8 | 56 |
| 9 | 18 |
| 10 | 1 |
| 11 | 24 |
| 12 | 224 |
| 13 | 1044 |
| 14 | 2593 |
| 15 | 3388 |
| 16 | 2150 |
| 17 | 552 |
| 18 | 36 |
| 19 | 1 |
| 20 | 40 |
| 21 | 686 |
| 22 | 6632 |
| 23 | 39979 |
| 24 | 157000 |
| 25 | 407620 |
| 26 | 695848 |
| 27 | 762180 |
| 28 | 510752 |
| 29 | 192672 |
| 30 | 35104 |
| 31 | 2180 |
| 32 | 1 |
| 33 | 60 |
| 34 | 1622 |
| 35 | 26172 |
| 36 | 281514 |
| 37 | 2135356 |
| 38 | 11785382 |
| 39 | 48145820 |
| 40 | 146702793 |
| 41 | 333518324 |
| 42 | 562203148 |