var p,q,n,nr:longint;
f,g:text;
function diviz(a,b:longint):longint;
begin
if a=b then diviz:=a
else if a>b then diviz:=diviz(a-b,b)
else diviz:=diviz(a,b-a)
end;
begin
nr:=0;
assign(f,'fractii.in');reset(f);
read(f,n);close(f);
for p:=1 to n do
	for q:=1 to n do
	if diviz(p,q)=1 then
		nr:=nr+1;
assign(g,'fractii.out');rewrite(g);
write(g,nr);
close(g);
end.