var f,g:text;
    n,i,j,k:longint;
begin
assign(f,'fractii.in'); reset(f);
assign(g,'fractii.out'); rewrite(g);
read(f,n);
if n=2 then writeln(g,'2')
else begin
k:=0;
for i:=1 to n do
for j:=1 to n do
if ((i mod j <> 0)and(j mod i<>0)) or (j=1) or(i=1)then inc(k);
writeln(g,k);
end;
close(f);
close(g);
end.