program fractii;
var
f1,f2:text;
nr:integer;
p,q,i,z,n:longint;
begin
assign(f1,'fractii.in');
reset(f1);
readln(f1,n);
nr:=n*n;
for i:=1 to n do
for z:=1 to n do
begin
p:=i;
q:=z;

if ((p<>1) and (q<>1)) then
 if (p mod q= 0) or (q mod p=0) then
nr:=nr-1;
end;
assign(f2,'fractii.out');
rewrite(f2);
writeln(f2,nr);
close(f1);
close(f2);
end.