n | a(n) |
---|---|
0 | 2 |
1 | 5 |
2 | 16 |
3 | 55 |
4 | 196 |
5 | 714 |
6 | 2640 |
7 | 9867 |
8 | 37180 |
9 | 140998 |
10 | 537472 |
11 | 2057510 |
12 | 7904456 |
13 | 30458900 |
14 | 117675360 |
15 | 455657715 |
16 | 1767883500 |
17 | 6871173870 |
18 | 26747767200 |
19 | 104268528210 |
20 | 406975466040 |
21 | 1590307356300 |
22 | 6220814327520 |
23 | 24357232569150 |
24 | 95452906901976 |
25 | 374369872911804 |
[2,5,16,55,196,714,2640,9867,37180,140998,537472, 2057510,7904456,30458900,117675360,455657715, 1767883500,6871173870,26747767200,104268528210, 406975466040,1590307356300,6220814327520, 24357232569150,95452906901976,374369872911804] |