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A261543
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Numbers of the form (prime(k) + Fibonacci(k))/2.
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0
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2, 5, 8, 15, 20, 42, 60, 137, 210, 520, 828, 2124, 3418, 8895, 14370, 37561, 60747, 158959, 257169, 673198, 1089220, 2851513, 4613807, 12078987, 19544166, 51167164, 82790160, 216747314, 350704463, 918156051, 1485607642, 3889371138, 6293134627
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OFFSET
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1,1
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COMMENTS
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The numbers represented as the arithmetic mean of the Fibonacci numbers and prime numbers with identical indices.
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LINKS
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FORMULA
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EXAMPLE
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a(1) = (prime(2) + Fibonacci(2))/2 = (3 + 1)/2 = 2.
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MATHEMATICA
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Select[Array[(Prime[#] + Fibonacci@ #)/2 &, 50], IntegerQ] (* Michael De Vlieger, Aug 24 2015 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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