for(
  $_=0b000000000000111111;
  ($x=$_)<=0b111111000000000000;
  $x&=~$x>>1,$x&=-$x,$_+=$x--,($x&=$_)?($_-=$x,$_+=$x/($x&-$x)):0
){
    printf "%018b\n",$_
}

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In reply to Re: Is there a faster way to do this? by I0
in thread Permutations in binary by Anonymous Monk

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