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A291778
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a(n) = 2^floor(2*n/3).
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5
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1, 1, 2, 4, 4, 8, 16, 16, 32, 64, 64, 128, 256, 256, 512, 1024, 1024, 2048, 4096, 4096, 8192, 16384, 16384, 32768, 65536, 65536, 131072, 262144, 262144, 524288, 1048576, 1048576, 2097152, 4194304, 4194304, 8388608, 16777216, 16777216, 33554432, 67108864, 67108864
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OFFSET
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0,3
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LINKS
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FORMULA
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Sum_{n>=0} 1/a(n) = 10/3.
Sum_{n>=0} (-1)^n/a(n) = 2/5. (End)
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MAPLE
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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