n | a(n) |
---|---|
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 3 |
7 | 5 |
8 | 12 |
9 | 27 |
10 | 62 |
11 | 149 |
12 | 371 |
13 | 952 |
14 | 2513 |
15 | 6807 |
16 | 18873 |
17 | 53472 |
18 | 154554 |
19 | 455076 |
20 | 1363287 |
21 | 4150560 |
22 | 12829558 |
23 | 40227005 |
24 | 127843589 |
25 | 411512640 |
26 | 1340747909 |
27 | 4418886387 |
28 | 14724633149 |
29 | 49582195801 |
30 | 168638834537 |
31 | 579103599979 |
[0,0,1,1,3,5,12,27,62,149,371,952,2513,6807,18873, 53472,154554,455076,1363287,4150560,12829558, 40227005,127843589,411512640,1340747909, 4418886387,14724633149,49582195801,168638834537, 579103599979] |