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 | 6 |
| 7 | 8 |
| 8 | 22 |
| 9 | 24 |
| 10 | 44 |
| 11 | 112 |
| 12 | 120 |
| 13 | 176 |
| 14 | 520 |
| 15 | 692 |
| 16 | 1732 |
| 17 | 1440 |
| 18 | 2592 |
| 19 | 4032 |
| 20 | 6480 |
| 21 | 11088 |
| 22 | 18720 |
| 23 | 23760 |
| 24 | 43200 |
| 25 | 69984 |
| 26 | 123120 |
| 27 | 174960 |
| 28 | 321732 |
| 29 | 408240 |
| 30 | 641520 |
| 31 | 1139184 |
| 32 | 1959552 |
| 33 | 2799360 |
| 34 | 5073840 |
| 35 | 8550684 |
| 36 | 12830400 |
| 37 | 20820240 |
| 38 | 36684900 |
| 39 | 60993000 |
| 40 | 101803608 |
| 41 | 127591200 |
| 42 | 231575760 |