n | a(n) |
---|---|
12 | 1 |
13 | 0 |
14 | 1 |
15 | 1 |
16 | 3 |
17 | 4 |
18 | 12 |
19 | 23 |
20 | 71 |
21 | 187 |
22 | 627 |
23 | 1970 |
24 | 6833 |
25 | 23384 |
26 | 82625 |
27 | 292164 |
28 | 1045329 |
29 | 3750277 |
30 | 13532724 |
31 | 48977625 |
32 | 177919099 |
33 | 648145255 |
34 | 2368046117 |
35 | 8674199554 |
36 | 31854078139 |
37 | 117252592450 |
38 | 432576302286 |
39 | 1599320144703 |
40 | 5925181102878 |
[1,0,1,1,3,4,12,23,71,187,627,1970,6833,23384, 82625,292164,1045329,3750277,13532724,48977625, 177919099,648145255,2368046117,8674199554, 31854078139,117252592450,432576302286, 1599320144703,5925181102878] |