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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 2 |
| 7 | 8 |
| 8 | 22 |
| 9 | 20 |
| 10 | 6 |
| 11 | 56 |
| 12 | 184 |
| 13 | 224 |
| 14 | 120 |
| 15 | 24 |
| 16 | 608 |
| 17 | 2248 |
| 18 | 3272 |
| 19 | 2352 |
| 20 | 840 |
| 21 | 120 |
| 22 | 9440 |
| 23 | 38080 |
| 24 | 62768 |
| 25 | 54336 |
| 26 | 26208 |
| 27 | 6720 |
| 28 | 720 |
| 29 | 198272 |
| 30 | 856480 |
| 31 | 1550528 |
| 32 | 1531344 |
| 33 | 896064 |
| 34 | 312480 |
| 35 | 60480 |
| 36 | 5040 |
| 37 | 5410688 |
| 38 | 24719488 |
| 39 | 48207488 |
| 40 | 52633344 |
| 41 | 35371776 |