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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 6 |
| 6 | 20 |
| 7 | 14 |
| 8 | 48 |
| 9 | 52 |
| 10 | 140 |
| 11 | 108 |
| 12 | 624 |
| 13 | 352 |
| 14 | 1400 |
| 15 | 2172 |
| 16 | 4464 |
| 17 | 4116 |
| 18 | 22112 |
| 19 | 14602 |
| 20 | 68016 |
| 21 | 88376 |
| 22 | 209936 |
| 23 | 190746 |
| 24 | 1075200 |
| 25 | 839128 |
| 26 | 2797000 |
| 27 | 3730584 |
| 28 | 11276704 |
| 29 | 9587580 |
| 30 | 67195520 |
| 31 | 35792568 |