Days Points 1 3 2 4 3 5 4 5 5 6 6 7 7 7 8 8 9 8 10 9 11 9 12 9 13 10 14 10 15 10 16 11 17 11 18 11 19 12 20 12 21 12 22 13 23 13 24 13 25 14 26 14 27 14 28 14 29 15 30 15 Matlab code: days = 1:30; p = round(2.7*(floor(days).^0.5)); r(:,1) = days; r(:,2) = p; p