n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 4 |
6 | 12 |
7 | 24 |
8 | 66 |
9 | 159 |
10 | 444 |
11 | 1161 |
12 | 3226 |
13 | 8785 |
14 | 24453 |
15 | 67716 |
16 | 189309 |
17 | 528922 |
18 | 1484738 |
19 | 4172185 |
20 | 11756354 |
21 | 33174451 |
22 | 93795220 |
23 | 265565628 |
24 | 753060469 |
25 | 2138206966 |
26 | 6078931114 |
27 | 17302380313 |
28 | 49302121747 |
29 | 140627400927 |
30 | 401510058179 |
[1,1,1,3,4,12,24,66,159,444,1161,3226,8785,24453, 67716,189309,528922,1484738,4172185,11756354, 33174451,93795220,265565628,753060469,2138206966, 6078931114,17302380313,49302121747,140627400927, 401510058179] |