n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 90 |
5 | 1716 |
6 | 11350 |
7 | 49860 |
8 | 173745 |
9 | 519345 |
10 | 1389078 |
11 | 3411060 |
12 | 7821950 |
13 | 16949910 |
14 | 35013240 |
15 | 69404416 |
16 | 132703770 |
17 | 245767890 |
18 | 442372300 |
19 | 776064960 |
20 | 1330117230 |
21 | 2231754820 |
22 | 3672227850 |
23 | 5934754020 |
24 | 9432962515 |
25 | 14763202395 |
[0,0,0,0,90,1716,11350,49860,173745,519345, 1389078,3411060,7821950,16949910,35013240, 69404416,132703770,245767890,442372300,776064960, 1330117230,2231754820,3672227850,5934754020, 9432962515,14763202395] |