Así: 2(0 + 1) + 1 = 3; 2(2 + 1) + 1 = 7; 2(4 + 1) + 1 = 11; 2(6 + 1) + 1 = 15; 2(8 + 1) + 1 = 19; 2(10 + 1) + 1 = 23.