n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 3 |
6 | 11 |
7 | 60 |
8 | 199 |
9 | 748 |
10 | 2181 |
11 | 5391 |
12 | 17193 |
13 | 31881 |
14 | 85942 |
15 | 218760 |
16 | 430339 |
17 | 728315 |
18 | 2344106 |
19 | 3096983 |
20 | 9344528 |
21 | 17859116 |
22 | 31658109 |
23 | 49644736 |
24 | 172596719 |
25 | 228795554 |
[0,0,0,0,3,11,60,199,748,2181,5391,17193,31881, 85942,218760,430339,728315,2344106,3096983, 9344528,17859116,31658109,49644736,172596719, 228795554] |