n | a(n) |
---|---|
9 | 1 |
10 | 1 |
11 | 2 |
12 | 4 |
13 | 11 |
14 | 32 |
15 | 117 |
16 | 468 |
17 | 2151 |
18 | 10722 |
19 | 58071 |
20 | 333774 |
21 | 2018321 |
22 | 12678506 |
23 | 82035085 |
24 | 542520052 |
25 | 3646124339 |
26 | 24791545874 |
27 | 169986552195 |
28 | 1172526610674 |
29 | 8122332718341 |
30 | 56435590886610 |
31 | 392969320828713 |
32 | 2740480494041976 |
33 | 19132214719583207 |
34 | 133671249471111626 |
[1,1,2,4,11,32,117,468,2151,10722,58071,333774, 2018321,12678506,82035085,542520052,3646124339, 24791545874,169986552195,1172526610674, 8122332718341,56435590886610,392969320828713, 2740480494041976,19132214719583207, 133671249471111626] |