n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 48 |
3 | 328 |
4 | 2240 |
5 | 15296 |
6 | 104448 |
7 | 713216 |
8 | 4870144 |
9 | 33255424 |
10 | 227082240 |
11 | 1550614528 |
12 | 10588258304 |
13 | 72301150208 |
14 | 493703135232 |
15 | 3371215880192 |
16 | 23020101959680 |
17 | 157191088635904 |
18 | 1073367893409792 |
19 | 7329414438191104 |
20 | 50048372358250496 |
[1,7,48,328,2240,15296,104448,713216,4870144, 33255424,227082240,1550614528,10588258304, 72301150208,493703135232,3371215880192, 23020101959680,157191088635904,1073367893409792, 7329414438191104,50048372358250496] |