n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 15 |
6 | 54 |
7 | 165 |
8 | 429 |
9 | 999 |
10 | 2145 |
11 | 4290 |
12 | 8100 |
13 | 14586 |
14 | 25194 |
15 | 41985 |
16 | 67830 |
17 | 106590 |
18 | 163431 |
19 | 245157 |
20 | 360525 |
21 | 520749 |
22 | 740025 |
23 | 1036035 |
24 | 1430703 |
25 | 1950975 |
26 | 2629575 |
27 | 3506085 |
28 | 4628052 |
29 | 6052068 |
30 | 7845255 |
31 | 10086780 |
32 | 12869340 |
33 | 16301142 |
[0,0,0,0,3,15,54,165,429,999,2145,4290,8100,14586, 25194,41985,67830,106590,163431,245157,360525, 520749,740025,1036035,1430703,1950975,2629575, 3506085,4628052,6052068,7845255,10086780,12869340, 16301142] |