n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 10 |
5 | 48 |
6 | 276 |
7 | 1768 |
8 | 12552 |
9 | 97408 |
10 | 818704 |
11 | 7396384 |
12 | 71380640 |
13 | 732058880 |
14 | 7943068992 |
15 | 90833753728 |
16 | 1091134058624 |
17 | 13728139694080 |
18 | 180436251140352 |
19 | 2471790031618560 |
[1,0,1,2,10,48,276,1768,12552,97408,818704, 7396384,71380640,732058880,7943068992,90833753728, 1091134058624,13728139694080,180436251140352, 2471790031618560] |