n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 4 |
6 | 11 |
7 | 24 |
8 | 52 |
9 | 226 |
10 | 969 |
11 | 2281 |
12 | 8960 |
13 | 29898 |
14 | 193202 |
15 | 1075509 |
16 | 3346852 |
17 | 14280775 |
18 | 75858992 |
19 | 332978617 |
20 | 2839114204 |
21 | 19507400962 |
22 | 75453432614 |
23 | 383685116089 |
24 | 2030801987312 |
25 | 14025840725149 |
26 | 77948290561659 |
27 | 884660446815877 |
28 | 7273497958681824 |
[1,0,0,1,1,4,11,24,52,226,969,2281,8960,29898, 193202,1075509,3346852,14280775,75858992, 332978617,2839114204,19507400962,75453432614, 383685116089,2030801987312,14025840725149, 77948290561659,884660446815877,7273497958681824] |