n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 3 |
5 | 3 |
6 | 33 |
7 | 72 |
8 | 120 |
9 | 583 |
10 | 1731 |
11 | 3888 |
12 | 13759 |
13 | 44775 |
14 | 119793 |
15 | 381220 |
16 | 1250328 |
17 | 3682284 |
18 | 11455153 |
19 | 37174428 |
20 | 114947724 |
21 | 359381467 |
22 | 1157319135 |
23 | 3663615552 |
24 | 11581104121 |
25 | 37220909916 |
26 | 119192219799 |
27 | 380580143110 |
28 | 1225279436706 |
29 | 3948906772872 |
30 | 12705801908002 |
[1,0,0,3,3,3,33,72,120,583,1731,3888,13759,44775, 119793,381220,1250328,3682284,11455153,37174428, 114947724,359381467,1157319135,3663615552, 11581104121,37220909916,119192219799,380580143110, 1225279436706,3948906772872,12705801908002] |