CoCalc Public Filestmp / 2015-03-17-114033.sagewsOpen in with one click!
Authors: Harald Schilly, ℏal Snyder, William A. Stein
len([n for n in range(100000) if is_squarefree(n)])
60794
60794.0/100000 N(1/zeta(2))
0.607940000000000 0.607927101854027