n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 3 |
4 | 0 |
5 | 10 |
6 | 36 |
7 | 35 |
8 | 448 |
9 | 450 |
10 | 4600 |
11 | 13167 |
12 | 45408 |
13 | 240006 |
14 | 670124 |
15 | 3863835 |
16 | 13209088 |
17 | 60533974 |
18 | 268324056 |
19 | 1089776654 |
20 | 5328589520 |
21 | 22065836226 |
22 | 106289169448 |
23 | 481033496803 |
24 | 2231768294208 |
25 | 10748702587800 |
26 | 49858509230920 |
27 | 245664498591891 |
28 | 1175943617623264 |
[1,1,0,3,0,10,36,35,448,450,4600,13167,45408, 240006,670124,3863835,13209088,60533974,268324056, 1089776654,5328589520,22065836226,106289169448, 481033496803,2231768294208,10748702587800, 49858509230920,245664498591891,1175943617623264] |