n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 1652 |
4 | 119550 |
5 | 1497328 |
6 | 16733124 |
7 | 108084480 |
8 | 588808172 |
9 | 2544811584 |
10 | 9516509988 |
11 | 31328336284 |
12 | 92876219432 |
13 | 252846150384 |
14 | 638250041288 |
15 | 1511780647680 |
16 | 3387237676950 |
17 | 7228330859840 |
18 | 14769380958438 |
19 | 29023337216604 |
20 | 55108233751768 |
21 | 101433859301088 |
[1,0,2,1652,119550,1497328,16733124,108084480, 588808172,2544811584,9516509988,31328336284, 92876219432,252846150384,638250041288, 1511780647680,3387237676950,7228330859840, 14769380958438,29023337216604,55108233751768, 101433859301088] |