n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 3 |
6 | 3 |
7 | 6 |
8 | 24 |
9 | 44 |
10 | 77 |
11 | 235 |
12 | 620 |
13 | 1321 |
14 | 3238 |
15 | 8791 |
16 | 21178 |
17 | 52662 |
18 | 140814 |
19 | 362458 |
20 | 927614 |
21 | 2437267 |
22 | 6376348 |
23 | 16629349 |
24 | 43733016 |
25 | 115226994 |
26 | 303620616 |
27 | 802665619 |
28 | 2127803992 |
29 | 5649706174 |
30 | 15031089644 |
31 | 40077352795 |
[0,0,3,3,6,24,44,77,235,620,1321,3238,8791,21178, 52662,140814,362458,927614,2437267,6376348, 16629349,43733016,115226994,303620616,802665619, 2127803992,5649706174,15031089644,40077352795] |