[1,1,2,5,15,51,188,731,2950,12235,51822,223191,
974427,4302645,19181100,86211885,390248055,
1777495635,8140539950,37463689775,173164232965,
803539474345,3741930523740,17481709707825,
81912506777200,384847173838501,1812610804416698,
8556895079642921,40480850291739165,
191884148712996795,911225151259732188,
4334673398737025619,20653004146207902678,
98551406393189773875]
|