n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 5 |
7 | 12 |
8 | 29 |
9 | 72 |
10 | 182 |
11 | 466 |
12 | 1207 |
13 | 3158 |
14 | 8334 |
15 | 22158 |
16 | 59299 |
17 | 159614 |
18 | 431838 |
19 | 1173710 |
20 | 3203244 |
21 | 8774780 |
22 | 24118522 |
23 | 66497316 |
24 | 183858411 |
25 | 509670494 |
26 | 1416231616 |
27 | 3944027402 |
28 | 11006186760 |
29 | 30772507128 |
30 | 86191006746 |
31 | 241815195292 |
32 | 679488418879 |
[1,0,1,1,2,5,12,29,72,182,466,1207,3158,8334, 22158,59299,159614,431838,1173710,3203244,8774780, 24118522,66497316,183858411,509670494,1416231616, 3944027402,11006186760,30772507128,86191006746, 241815195292,679488418879] |