n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 38 |
5 | 156 |
6 | 692 |
7 | 3256 |
8 | 16200 |
9 | 84496 |
10 | 460592 |
11 | 2611104 |
12 | 15355232 |
13 | 93376960 |
14 | 585989952 |
15 | 3786534784 |
16 | 25152768128 |
17 | 171474649344 |
18 | 1198143415040 |
19 | 8569374206464 |
20 | 62668198184448 |
21 | 468111364627456 |
22 | 3568287053001728 |
[1,1,3,10,38,156,692,3256,16200,84496,460592, 2611104,15355232,93376960,585989952,3786534784, 25152768128,171474649344,1198143415040, 8569374206464,62668198184448,468111364627456, 3568287053001728] |