High Quality Content by WIKIPEDIA articles! In number theory, the Embree Trefethen constant is a threshold value labelled .For a fixed positive number , consider the recurrence x_{n+1}=x_n pm beta x_{n-1} , where the sign in the sum is chosen at random for each n independently with equal probabilities for "+" and " ".It can be proven that for any choice of , the limit sigma(beta) = lim_{n to infty} ( x_n ^{1/n}) , exists almost surely. In informal words, the sequence behaves exponentially with probability one, and ( ) can be interpreted as its almost sure rate of exponential growth.We have 1 for ,so they grow exponentially.Regarding values of , we have: (1) = 1.13198824...(Viswanath's constant), and ( ) = 1.