$initValue = 2;
$step = 3;
$numOfMembers = 5;

$str = '2 5 8 11 14';

my $str = $initValue;
for my $member (1..$numOfMembers-1) {
   $str .=  ' ' . ($initValue + $member*$step);
}
print $str, $/;

$str = join ' ', map{ $initValue+$step*$_ } 0..$numOfMembers-1;
print $str, $/;