>> rwalktest
    NUMBER OF RUNS =    100
    n MIN-STEP  MAX-STEP   AVE-STEP   CROSSINGS   
    5        7       145     27.700      0.7900
   20      101      2477    492.790      2.3900
   80     1269     31316   7379.930      2.5100
% A post-mortem note: the last run for n=80 takes plenty of time!