def t_o(a):
    t = int(a/2)
    b = t*t-1
    c = t*t+1
    f = (a*a+b*b==c*c)
    print(f,'ou',a,b,c,a*a+b*b,c*c)

def t_j(a):
    t =a*a
    b=int(t/2)
    c =t-b
    f = (a*a+b*b==c*c)
    print(f,'j-',a,b,c,f,a*a+b*b,c*c)
    

for i in range(2,100,2):
    t_o(i)
    t_j(i+1)

奇数平方写连续

偶数半方加减一