n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 78 |
6 | 362 |
7 | 1473 |
8 | 5657 |
9 | 30045 |
10 | 150862 |
11 | 690604 |
12 | 3048236 |
13 | 14043152 |
14 | 84667280 |
15 | 484698208 |
16 | 2661357616 |
17 | 13753927840 |
18 | 73080151824 |
19 | 374413073328 |
20 | 1963753297884 |
21 | 10358706625196 |
22 | 69857764331270 |
23 | 447802562823975 |
[1,1,2,6,24,78,362,1473,5657,30045,150862,690604, 3048236,14043152,84667280,484698208,2661357616, 13753927840,73080151824,374413073328, 1963753297884,10358706625196,69857764331270, 447802562823975] |