n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 15 |
5 | 50 |
6 | 186 |
7 | 834 |
8 | 4243 |
9 | 24318 |
10 | 154780 |
11 | 1083952 |
12 | 8280624 |
13 | 68531308 |
14 | 610796150 |
15 | 5832677415 |
16 | 59411150931 |
17 | 642979374958 |
18 | 7368000716808 |
19 | 89121684577460 |
20 | 1134732527849730 |
21 | 15170256449030866 |
22 | 212469074496520610 |
23 | 3111026318662704255 |
24 | 47532980801984327584 |
[0,1,3,6,15,50,186,834,4243,24318,154780,1083952, 8280624,68531308,610796150,5832677415,59411150931, 642979374958,7368000716808,89121684577460, 1134732527849730,15170256449030866, 212469074496520610,3111026318662704255, 47532980801984327584] |