var f,g:text;
    n,p,q,min,d,i,s:integer;
begin
assign(f,'fractii.in');
reset(f);
readln(f,n);
close(f);
s:=0;
for p:=1 to n do
    for q:=1 to n do
        begin
        if p>q then min:=q
               else min:=p;
        d:=1;
        for i:=2 to min do
            if (p mod i=0) and (q mod i=0) then d:=d+1;
        if d=1 then s:=s+1;
        end;
assign(g,'fractii.out');
rewrite(g);
writeln(g,s);
close(g);
end.