n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 56 |
3 | 336 |
4 | 1680 |
5 | 7392 |
6 | 29568 |
7 | 109824 |
8 | 384384 |
9 | 1281280 |
10 | 4100096 |
11 | 12673024 |
12 | 38019072 |
13 | 111132672 |
14 | 317521920 |
15 | 889061376 |
16 | 2444918784 |
17 | 6615662592 |
18 | 17641766912 |
19 | 46425702400 |
20 | 120706826240 |
21 | 310388981760 |
22 | 790081044480 |
[1,7,56,336,1680,7392,29568,109824,384384,1281280, 4100096,12673024,38019072,111132672,317521920, 889061376,2444918784,6615662592,17641766912, 46425702400,120706826240,310388981760, 790081044480] |