var n,nr,i,j:longint;f,g:text;
function cmmdc(a,b:longint):longint;
var x,y,k:longint;
begin
x:=a mod b;k:=x;
if x=0 then cmmdc:=b
   else
   begin
   repeat
   y:=b mod x;
   b:=x;
   x:=y;
   if x<>0 then k:=x;
   until x=0;
   cmmdc:=k;
   end;
end;
begin
nr:=0;
assign(f,'fractii.in');
reset(f);
read(f,n);
close(f);
for i:=1 to n do
 for j:=1 to n do
    if cmmdc(i,j)=1 then inc(nr);
assign(g,'fractii.out');
rewrite(g);
writeln(g,nr);
close(g);
end.