n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 140 |
6 | 1125 |
7 | 5355 |
8 | 19075 |
9 | 56133 |
10 | 143955 |
11 | 332475 |
12 | 706860 |
13 | 1404975 |
14 | 2640638 |
15 | 4733820 |
16 | 8149050 |
17 | 13543390 |
18 | 21825450 |
19 | 34227018 |
20 | 52388985 |
21 | 78463350 |
22 | 115233195 |
23 | 166252625 |
24 | 236008773 |
25 | 330108075 |
26 | 455489125 |
27 | 620664525 |
28 | 835994250 |
[0,0,0,0,3,140,1125,5355,19075,56133,143955, 332475,706860,1404975,2640638,4733820,8149050, 13543390,21825450,34227018,52388985,78463350, 115233195,166252625,236008773,330108075,455489125, 620664525,835994250] |