Array en orden inverso:
Array ( [0] => 131 [1] => 491 [2] => 93 [3] => 599 [4] => 378 [5] => 821 [6] => 738 [7] => 516 [8] => 851 [9] => 512 [10] => 461 [11] => 950 [12] => 809 [13] => 487 [14] => 374 [15] => 292 [16] => 915 [17] => 926 [18] => 533 [19] => 17 )