n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 118 |
4 | 409 |
5 | 2368 |
6 | 15750 |
7 | 112716 |
8 | 845295 |
9 | 6551208 |
10 | 52035714 |
11 | 421286280 |
12 | 3463401007 |
13 | 28832656408 |
14 | 242565115858 |
15 | 2058945519936 |
16 | 17611312647075 |
17 | 151647023490480 |
18 | 1313460091978458 |
19 | 11435310622320552 |
20 | 100019000856225156 |
21 | 878443730199290560 |
[0,0,0,118,409,2368,15750,112716,845295,6551208, 52035714,421286280,3463401007,28832656408, 242565115858,2058945519936,17611312647075, 151647023490480,1313460091978458, 11435310622320552,100019000856225156, 878443730199290560] |