n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 32 |
4 | 168 |
5 | 880 |
6 | 4608 |
7 | 24128 |
8 | 126336 |
9 | 661504 |
10 | 3463680 |
11 | 18136064 |
12 | 94961664 |
13 | 497225728 |
14 | 2603507712 |
15 | 13632143360 |
16 | 71378829312 |
17 | 373744402432 |
18 | 1956951097344 |
19 | 10246728974336 |
20 | 53652569456640 |
21 | 280928500842496 |
22 | 1470960727228416 |
23 | 7702050360000512 |
24 | 40328459251089408 |
[0,1,6,32,168,880,4608,24128,126336,661504, 3463680,18136064,94961664,497225728,2603507712, 13632143360,71378829312,373744402432, 1956951097344,10246728974336,53652569456640, 280928500842496,1470960727228416,7702050360000512, 40328459251089408] |