y1 = 1^2 - 2(1) + 13 = 1 - 2 + 13 = 12y2 = 2^2 - 2(2) + 13 = 4 - 4 + 13 = 13y3 = 3^2 - 2(3) + 13 = 9 - 6 + 13 = 16y4 = 4^2 - 2(4) + 13 = 16 - 8 + 13 = 21y5 = 5^2 - 2(5) + 13 = 25 - 10 + 13 = 28

И так далее, числа в последовательности будут равны: 12, 13, 16, 21, 28, ...