n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 12 |
5 | 65 |
6 | 210 |
7 | 1477 |
8 | 7560 |
9 | 45864 |
10 | 338310 |
11 | 2176031 |
12 | 17657640 |
13 | 139280869 |
14 | 1150004856 |
15 | 10572694860 |
16 | 94834041120 |
17 | 931995595457 |
18 | 9384294360168 |
19 | 96974005210273 |
20 | 1066116104926500 |
21 | 11838081891521760 |
22 | 137785102884102366 |
23 | 1652584041236345933 |
[1,0,2,3,12,65,210,1477,7560,45864,338310,2176031, 17657640,139280869,1150004856,10572694860, 94834041120,931995595457,9384294360168, 96974005210273,1066116104926500,11838081891521760, 137785102884102366,1652584041236345933] |