var n,q,i,j,p,m:longint;f,g:text;
begin
assign(f,'fractii.in');reset(f);
assign(g,'fractii.out');rewrite(g);
readln(f,n);
q:=0;
for i:=1 to n do begin
for j:=1 to n do begin
m:=i;
p:=j;
while m<>p do begin
if m>p then m:=m div p
       else p:=p div m;
       end;
if m=1 then inc(q);
end;
end;
writeln(g,q);
close(f);
close(g);
end.