n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 6 |
7 | 8 |
8 | 22 |
9 | 60 |
10 | 102 |
11 | 262 |
12 | 694 |
13 | 1564 |
14 | 3552 |
15 | 9430 |
16 | 23423 |
17 | 57108 |
18 | 144774 |
19 | 374118 |
20 | 953824 |
21 | 2460356 |
22 | 6427240 |
23 | 16851190 |
24 | 44243785 |
25 | 117119492 |
26 | 311098391 |
27 | 828359180 |
28 | 2211105633 |
29 | 5921156854 |
30 | 15876753164 |
31 | 42641417130 |
[0,0,4,6,8,22,60,102,262,694,1564,3552,9430,23423, 57108,144774,374118,953824,2460356,6427240, 16851190,44243785,117119492,311098391,828359180, 2211105633,5921156854,15876753164,42641417130] |