n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 132 |
3 | 3080 |
4 | 57360 |
5 | 983072 |
6 | 16252992 |
7 | 264241280 |
8 | 4261413120 |
9 | 68451041792 |
10 | 1097364145152 |
11 | 17575006177280 |
12 | 281337537761280 |
13 | 4502500115750912 |
14 | 72048797944922112 |
15 | 1152851135862702080 |
16 | 18446181123756195840 |
17 | 295143401579725586432 |
18 | 4722330454072626511872 |
[0,2,132,3080,57360,983072,16252992,264241280, 4261413120,68451041792,1097364145152, 17575006177280,281337537761280,4502500115750912, 72048797944922112,1152851135862702080, 18446181123756195840,295143401579725586432, 4722330454072626511872] |