Lucas Numbers
From charlesreid1
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Mathematical Constants
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The Lucas numbers are closely related to the Fibonacci numbers, using the same recurrence relation but with different initial conditions.
$ L(n) = L(n-1) + L(n-2) \qquad L(0) = 2, L(1) = 1 $
Compare to the original Fibonacci sequence:
$ F(n) = F(n-1) + F(n-2) \qquad F(0) = 2, F(1) = 1 $