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proposed
a(n) = (-1)^n + 2*A110526(n) + A110679(n-2) for n >= 2. - Greg Dresden, May 25 2024
approved
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a(n) = -(1/2)*(2 - sqrt(5))^n + (-1)^n - (1/2)*(2 + sqrt(5))^n + (2/5)*(2 + sqrt(5))^n*sqrt(5) - (2/5)*(2 - sqrt(5))^n*sqrt(5), with n >= 0. - Paolo P. Lava, Oct 02 2008
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editing
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a(n) = (-1)^n + 3*FibonacciA001076(3*n)/2 - FibonacciA015448(3*n - 1). - Ehren Metcalfe, Nov 18 2017
approved
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reviewed
approved
proposed
reviewed