Вывести таблицу умножения на Паскале

uses crt;
var a:array[0..50,0..50]of integer;
 i,j,n:integer;
begin
readln(n);
for i:=1 to n do
begin
 a[i,0]:=i;
 a[0,i]:=i;
end;
for i:=1 to n do
 for j:=1 to n do
 begin
 a[i,j]:=i*j;
 end;
 
for i:=0 to n do
begin
 for j:=0 to n do
 begin
 if (i=0) or (j=0) then
 textcolor(lightgreen)
 else
 textcolor(white);
 write(a[i,j]:4);
 end;
 writeln;
end;
end;