var v:array[1..50] of boolean;
    x,y,p,q,i,j,n,cmmdc,k:integer;
    f,g:text;
begin
k:=0;
assign(f,'fractii.in');reset(f);
assign(g,'fractii.out');rewrite(g);
read(f,n);
for p:=1 to n do
    for q:=1 to n do
    begin
    x:=p;
    y:=q;
    while x<>y do
      if x>y then x:=x-y
             else y:=y-x;
    cmmdc:=x;
    if cmmdc=1 then inc(k);
    end;
write(g,k);
close(f);
close(g);
end.