Task
Produce an ASCII representation of a Sierpinski triangle of order   N.



Example
The Sierpinski triangle of order   4   should look like this:

                       *
                      * *
                     *   *
                    * * * *
                   *       *
                  * *     * *
                 *   *   *   *
                * * * * * * * *
               *               *
              * *             * *
             *   *           *   *
            * * * *         * * * *
           *       *       *       *
          * *     * *     * *     * *
         *   *   *   *   *   *   *   *
        * * * * * * * * * * * * * * * *



Related tasks
 Sierpinski triangle/Graphical for graphics images of this pattern. 
 Sierpinski carpet


41+2>\#*1#2-#<:#\_$:1+v
v:$_:#`0#\\#00#:p#->#1<
>2/1\0p:2/\::>1-:>#v_1v
>8#4*#*+#+,#5^#5g0:<  1
vg11<\*g11!:g 0-1:::<p<
>!*+!!\0g11p\ 0p1-:#^_v
@$$_\#!:#::#-^#1\$,+55<