n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 128 |
4 | 486 |
5 | 1692 |
6 | 5512 |
7 | 17040 |
8 | 50496 |
9 | 144512 |
10 | 401664 |
11 | 1089024 |
12 | 2890240 |
13 | 7529472 |
14 | 19298304 |
15 | 48754688 |
16 | 121602048 |
17 | 299827200 |
18 | 731643904 |
19 | 1768685568 |
20 | 4239261696 |
21 | 10081796096 |
22 | 23805296640 |
23 | 55839817728 |
24 | 130187001856 |
25 | 301813727232 |
26 | 696036360192 |
27 | 1597358735360 |
[1,6,30,128,486,1692,5512,17040,50496,144512, 401664,1089024,2890240,7529472,19298304,48754688, 121602048,299827200,731643904,1768685568, 4239261696,10081796096,23805296640,55839817728, 130187001856,301813727232,696036360192, 1597358735360] |