n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 3 |
4 | 12 |
5 | 36 |
6 | 162 |
7 | 1008 |
8 | 6048 |
9 | 33048 |
10 | 176256 |
11 | 940896 |
12 | 5038848 |
13 | 27433728 |
14 | 152845056 |
15 | 863910489 |
16 | 4899999744 |
17 | 27770211072 |
18 | 157340548224 |
19 | 892662156288 |
20 | 5078255822436 |
21 | 28988793435209 |
22 | 166023914360832 |
23 | 953309368018944 |
24 | 5484237660094464 |
25 | 31596861676172076 |
[0,0,3,12,36,162,1008,6048,33048,176256,940896, 5038848,27433728,152845056,863910489,4899999744, 27770211072,157340548224,892662156288, 5078255822436,28988793435209,166023914360832, 953309368018944,5484237660094464, 31596861676172076] |