spyridonsfunction.sagews

var('n')

n

f(n) = floor(n/floor(sqrt(n)))
show(f)

$\displaystyle n \ {\mapsto}\ \left \lfloor \frac{n}{\left \lfloor \sqrt{n} \right \rfloor} \right \rfloor$

N=300
coords = [(j,f(j)) for j in range(1,N)]
P = plot(point(coords,size=2))
P+=plot(sqrt(x),(x,1,N),color='red')
P