One is similar, two are different, N2 =10c (9,2) = 360 (species).
The same is true for n3 = c (10/0,2) = 45 (species).
There are three identical and one different, n4 = a (10/0,2) = 90 (species).
4 same, n5= 10 (species)
Then n = 210+360+45+90+10 = 715 (species).