n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 44 |
4 | 196 |
5 | 872 |
6 | 3880 |
7 | 17264 |
8 | 76816 |
9 | 341792 |
10 | 1520800 |
11 | 6766784 |
12 | 30108736 |
13 | 133968512 |
14 | 596091520 |
15 | 2652303104 |
16 | 11801395456 |
17 | 52510188032 |
18 | 233643543040 |
19 | 1039594548224 |
20 | 4625665278976 |
21 | 20581850212352 |
22 | 91578731407360 |
[1,2,10,44,196,872,3880,17264,76816,341792, 1520800,6766784,30108736,133968512,596091520, 2652303104,11801395456,52510188032,233643543040, 1039594548224,4625665278976,20581850212352, 91578731407360] |