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A062306
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Number of ways writing 2^n as a sum of two nonprime numbers.
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0
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1, 0, 1, 4, 7, 19, 36, 82, 170, 362, 740, 1537, 3144, 6443, 13116, 26661, 54034, 109386, 221121, 446502, 900436, 1814910, 3655069, 7356483, 14796994, 29750473, 59789057, 120112121, 241218391, 484287995, 972034297, 1950544851
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OFFSET
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1,4
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LINKS
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FORMULA
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a(n)=A062610(2^n) = number of nonprime+nonprime partitions of 2^n.
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EXAMPLE
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n = 5: 2^5 = 32 = 4+28 = 6+26 = 8+24 = 10+22 = 12+20 = 14+18 = 16+16, so a(5) = 7.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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