n | a(n) |
---|---|
2 | 1 |
3 | 10 |
4 | 50 |
5 | 214 |
6 | 802 |
7 | 2802 |
8 | 9275 |
9 | 29580 |
10 | 91668 |
11 | 277924 |
12 | 828092 |
13 | 2433140 |
14 | 7067885 |
15 | 20337318 |
16 | 58054534 |
17 | 164602410 |
18 | 463990190 |
19 | 1301338150 |
20 | 3633753815 |
21 | 10107239160 |
22 | 28016346216 |
23 | 77419909800 |
24 | 213349801560 |
25 | 586471432104 |
26 | 1608485221177 |
27 | 4402406713762 |
[1,10,50,214,802,2802,9275,29580,91668,277924, 828092,2433140,7067885,20337318,58054534, 164602410,463990190,1301338150,3633753815, 10107239160,28016346216,77419909800,213349801560, 586471432104,1608485221177,4402406713762] |