program fractii;
var n,i,j,x:longint;
    d,o:text;
function cmmdc(a,b:longint):longint;
  begin
   if ((a mod b=0)or(b mod a=0)) and ((b<>1)) then cmmdc:=1 else
    while a<>b do
      if a<b then repeat b:=b-a until b<=a
             else repeat a:=a-b until a<=b;
    cmmdc:=a;
  end;
begin
assign(d,'fractii.in');assign(o,'fractii.out');
reset(d);rewrite(o);
read(d,n);
x:=0;
for i:=1 to n do
  for j:=1 to n do
    if cmmdc(i,j)=1 then x:=x+1;
writeln(o,x);
close(d);
close(o);
end.