n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 38 |
6 | 213 |
7 | 1479 |
8 | 11692 |
9 | 104364 |
10 | 1036809 |
11 | 11344859 |
12 | 135548466 |
13 | 1755739218 |
14 | 24504637741 |
15 | 366596136399 |
16 | 5852040379224 |
17 | 99283915922264 |
18 | 1783921946910417 |
19 | 33840669046326579 |
20 | 675849838112277598 |
21 | 14174636583759324798 |
[0,0,1,3,6,38,213,1479,11692,104364,1036809, 11344859,135548466,1755739218,24504637741, 366596136399,5852040379224,99283915922264, 1783921946910417,33840669046326579, 675849838112277598,14174636583759324798] |