найдите закономерность 5, 500, 10, 2000, 15, ******, 20, 8000, *****, 12500,****,**********,****, ********, ****, *********, ****, *********, 50, *********.

5; 500; 10; 2000; 15;4500 ; 20; 8000; 25; 12500; 30; 18000; 35; 24500; 40;32000; 45.; 40500; 50; 50000