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473rd Lucas Number

473rd Number in the Lucas Number Sequence = 513637207677450246125760857023446893186481668075116373246321641937144993869266524849692790595738232

In general, the nth term is given by f(n-1)+f(n-2)

To understand this sequence and how it differs from the Fibonacci series, you might find it useful to read the Lucas Sequence tutorial over here.