program spiral;

{$APPTYPE CONSOLE}

uses
  SysUtils;
  var k,k1,k2,j,i,n:integer;
      a:array [1..100,1..100] of integer;
begin
readln (n);
k1:=1; k2:=n-1; k:=1;
while k<=(n*n) do
  begin
   for j:=k1 to k2 do
    begin
     a[k1,j]:=k;
     k:=k+1;
     end;
   for i:=k1 to k2 do
    begin
     a[i,k2+1]:=k;
     k:=k+1;

    end;

   for j:=k2+1 downto k1+1 do
    begin
     a[k2+1,j]:=k;
     k:=k+1;
    end;

  for i:=k2+1 downto k1+1 do
    begin
     a[i,k1]:=k;
      k:=k+1;
    end;
k1:=k1+1;
k2:=k2-1;
    end;
  for i:=1 to n do begin
  for j:=1 to n do write(a[i,j]:5,' ');
                   writeln;
                   end;
  readln
  { TODO -oUser -cConsole Main : Insert code here }
end.