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 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 6 |
| 7 | 28 |
| 8 | 46 |
| 9 | 36 |
| 10 | 80 |
| 11 | 198 |
| 12 | 132 |
| 13 | 520 |
| 14 | 560 |
| 15 | 600 |
| 16 | 2206 |
| 17 | 3570 |
| 18 | 1908 |
| 19 | 9348 |
| 20 | 12960 |
| 21 | 11760 |
| 22 | 25704 |
| 23 | 63480 |
| 24 | 50692 |
| 25 | 150000 |
| 26 | 180960 |
| 27 | 208008 |
| 28 | 609084 |
| 29 | 1130304 |
| 30 | 604800 |
| 31 | 3010348 |
| 32 | 4865280 |
| 33 | 3920400 |
| 34 | 8374344 |
| 35 | 17836000 |
| 36 | 13685760 |
| 37 | 54018520 |
| 38 | 58269200 |
| 39 | 69600960 |