n | a(n) |
---|---|
0 | 0 |
1 | 6 |
2 | 36 |
3 | 210 |
4 | 1224 |
5 | 7134 |
6 | 41580 |
7 | 242346 |
8 | 1412496 |
9 | 8232630 |
10 | 47983284 |
11 | 279667074 |
12 | 1630019160 |
13 | 9500447886 |
14 | 55372668156 |
15 | 322735561050 |
16 | 1881040698144 |
17 | 10963508627814 |
18 | 63900011068740 |
19 | 372436557784626 |
20 | 2170719335639016 |
[0,6,36,210,1224,7134,41580,242346,1412496, 8232630,47983284,279667074,1630019160,9500447886, 55372668156,322735561050,1881040698144, 10963508627814,63900011068740,372436557784626, 2170719335639016] |