High Quality Content by WIKIPEDIA articles! A random Fibonacci sequence is a variant of the Fibonacci sequence, defined by the recurrence relation fn = fn?1 ± fn?2 with the signs chosen randomly. Viswanath's constant is a mathematical constant measuring how fast random Fibonacci sequences grow. The value of Viswanath's constant is approximately 1.13198824.In other words, given the previous two elements of the sequence, there are two possible formulas for the next element, corresponding to the two choices for the two signs. The decision which formula to use is taken at random with a probability of 1/2 favouring each possibility.

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