program to produce these outputs

I need a program that will produce these outputs

enter number of rows 4

(This set of astericks comes out just this way)

enter number of rows 4

(This set of astericks are indented and form a shape resembling a Christmas tree).
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Program Chr_Tree;
   Max, J1, J2, J3 : Ineteger;
   Write( 'Enter number of rows: ' );
   Readln( Max );
   for J1 := 1 to Max do begin
     J2 := J1 * 2 - 1;
     for J3 := 1 to J2 do Write( '*');
   end; {for}


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