n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 4 |
7 | 8 |
8 | 20 |
9 | 48 |
10 | 106 |
11 | 264 |
12 | 580 |
13 | 1462 |
14 | 3724 |
15 | 8604 |
16 | 21558 |
17 | 55364 |
18 | 137162 |
19 | 348320 |
20 | 900372 |
21 | 2325534 |
22 | 6063822 |
23 | 15903112 |
24 | 41844862 |
25 | 110699956 |
26 | 293478616 |
27 | 779292432 |
28 | 2075209638 |
29 | 5534781586 |
30 | 14778464050 |
31 | 39525926012 |
[0,0,4,4,8,20,48,106,264,580,1462,3724,8604,21558, 55364,137162,348320,900372,2325534,6063822, 15903112,41844862,110699956,293478616,779292432, 2075209638,5534781586,14778464050,39525926012] |