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A058040
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Numbers k such that if p_1,p_2,...,p_m, m>1, are the prime factors of k, then there is some b>0 such that k = Sum_{i=1..m} b^(p_i).
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0
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OFFSET
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1,1
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COMMENTS
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No others < 1000000.
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LINKS
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EXAMPLE
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12=2^2*3=2^2+2^3 (b=2);
36=2^2*3^2=3^2+3^3 (b=3);
576=2^6*3^2=8^2+8^3 (b=8);
16464=2^4*3*7^3=4^2+4^3+4^7 (b=4).
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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