n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 28 |
4 | 136 |
5 | 656 |
6 | 3168 |
7 | 15296 |
8 | 73856 |
9 | 356608 |
10 | 1721856 |
11 | 8313856 |
12 | 40142848 |
13 | 193826816 |
14 | 935878656 |
15 | 4518821888 |
16 | 21818802176 |
17 | 105350496256 |
18 | 508677193728 |
19 | 2456110759936 |
20 | 11859151814656 |
21 | 57261050298368 |
22 | 276480808452096 |
[0,1,6,28,136,656,3168,15296,73856,356608,1721856, 8313856,40142848,193826816,935878656,4518821888, 21818802176,105350496256,508677193728, 2456110759936,11859151814656,57261050298368, 276480808452096] |