n | a(n) |
---|---|
10 | 0 |
11 | 1 |
12 | 1 |
13 | 3 |
14 | 8 |
15 | 22 |
16 | 60 |
17 | 167 |
18 | 465 |
19 | 1306 |
20 | 3681 |
21 | 10423 |
22 | 29598 |
23 | 84313 |
24 | 240753 |
25 | 689013 |
26 | 1975659 |
27 | 5674795 |
28 | 16324964 |
29 | 47028023 |
30 | 135644560 |
31 | 391688786 |
32 | 1132214211 |
33 | 3275875432 |
34 | 9486452173 |
35 | 27493411246 |
36 | 79739872605 |
37 | 231430858159 |
38 | 672117007940 |
39 | 1953114145155 |
40 | 5678747077372 |
[0,1,1,3,8,22,60,167,465,1306,3681,10423,29598, 84313,240753,689013,1975659,5674795,16324964, 47028023,135644560,391688786,1132214211, 3275875432,9486452173,27493411246,79739872605, 231430858159,672117007940,1953114145155, 5678747077372] |