n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 3 |
4 | 6 |
5 | 12 |
6 | 27 |
7 | 63 |
8 | 153 |
9 | 381 |
10 | 969 |
11 | 2505 |
12 | 6564 |
13 | 17394 |
14 | 46533 |
15 | 125505 |
16 | 340902 |
17 | 931716 |
18 | 2560401 |
19 | 7070337 |
20 | 19609146 |
21 | 54597852 |
22 | 152556057 |
23 | 427642677 |
24 | 1202289669 |
25 | 3389281245 |
26 | 9578183391 |
27 | 27130207503 |
28 | 77009455428 |
29 | 219023318406 |
30 | 624069834627 |
31 | 1781228354487 |
[1,0,3,3,6,12,27,63,153,381,969,2505,6564,17394, 46533,125505,340902,931716,2560401,7070337, 19609146,54597852,152556057,427642677,1202289669, 3389281245,9578183391,27130207503,77009455428, 219023318406,624069834627,1781228354487] |