n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 6 |
4 | 28 |
5 | 193 |
6 | 1140 |
7 | 7688 |
8 | 52364 |
9 | 373560 |
10 | 2732836 |
11 | 20506254 |
12 | 156899748 |
13 | 1221179922 |
14 | 9642327324 |
15 | 77092881840 |
16 | 623120435820 |
17 | 5085013101160 |
18 | 41850590485164 |
19 | 347060754685884 |
20 | 2897800074184240 |
21 | 24344668688255109 |
22 | 205667186830447412 |
23 | 1746375819789491992 |
[1,1,0,6,28,193,1140,7688,52364,373560,2732836, 20506254,156899748,1221179922,9642327324, 77092881840,623120435820,5085013101160, 41850590485164,347060754685884,2897800074184240, 24344668688255109,205667186830447412, 1746375819789491992] |