Продолжи ряд чисел 10-0 11-1 12-2 15-0 19-4 20-0 23-3 30-? 37-? 41-?
21-1 22-2 23-3 24-4 25-0 26-1 27-2 28-3 29-4 30-0 ... 37-2 ... 41-1
21-1 22-2 23-3 24-4 25-0 26-1 27-2 28-3 29-4 30-0 37-2 41-1