n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 4 |
5 | 20 |
6 | 84 |
7 | 220 |
8 | 560 |
9 | 1140 |
10 | 2300 |
11 | 4060 |
12 | 7140 |
13 | 11480 |
14 | 18424 |
15 | 27720 |
16 | 41664 |
17 | 59640 |
18 | 85320 |
19 | 117480 |
20 | 161700 |
21 | 215820 |
22 | 287980 |
23 | 374660 |
24 | 487344 |
25 | 620620 |
26 | 790244 |
27 | 988260 |
28 | 1235780 |
29 | 1521520 |
30 | 1873200 |
31 | 2275280 |
32 | 2763520 |
33 | 3317040 |
34 | 3981264 |
35 | 4728720 |
36 | 5616324 |
37 | 6608580 |
[0,0,0,0,4,20,84,220,560,1140,2300,4060,7140, 11480,18424,27720,41664,59640,85320,117480,161700, 215820,287980,374660,487344,620620,790244,988260, 1235780,1521520,1873200,2275280,2763520,3317040, 3981264,4728720,5616324,6608580] |