n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 24 |
5 | 64 |
6 | 168 |
7 | 441 |
8 | 1155 |
9 | 3025 |
10 | 7920 |
11 | 20736 |
12 | 54288 |
13 | 142129 |
14 | 372099 |
15 | 974169 |
16 | 2550408 |
17 | 6677056 |
18 | 17480760 |
19 | 45765225 |
20 | 119814915 |
21 | 313679521 |
22 | 821223648 |
23 | 2149991424 |
24 | 5628750624 |
25 | 14736260449 |
26 | 38580030723 |
27 | 101003831721 |
[0,1,3,9,24,64,168,441,1155,3025,7920,20736,54288, 142129,372099,974169,2550408,6677056,17480760, 45765225,119814915,313679521,821223648,2149991424, 5628750624,14736260449,38580030723,101003831721] |