From Wikipedia, the free encyclopedia:

 A happy number is defined by the following process:
 Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals   1   (where it will stay),   or it loops endlessly in a cycle which does not include   1.   


 Those numbers for which this process end in   1   are       happy   numbers,   
 while   those numbers   that   do   not   end in   1   are   unhappy   numbers. 


Task

Find and print the first   8   happy numbers.

Display an example of your output here on this page.



See also

   The OEIS entry:   The     happy numbers:   A007770
   The OEIS entry:   The unhappy numbers;   A031177


use List::Util qw(sum);
 
sub ishappy {
  my $s = shift;
  while ($s > 6 && $s != 89) {
    $s = sum(map { $_*$_ } split(//,$s));
  }
  $s == 1;
}
 
my $n = 0;
print join(" ", map { 1 until ishappy(++$n); $n; } 1..8), "\n";