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A374138
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Numbers k that have more than two prime factors (with multiplicity) and A075255(k) is a multiple of A374127(k).
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1
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OFFSET
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1,1
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LINKS
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FORMULA
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PROG
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(PARI)
A001414(n) = ((n=factor(n))[, 1]~*n[, 2]);
A374128(n) = { my(s=A001414(n), x=n-s, u=(sigma(n)-s)-n); (gcd(x, u)==abs(u)); };
isA374138(n) = ((bigomega(n) > 2) && A374128(n));
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CROSSREFS
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Cf. A000396 (after its initial 6, is a subsequence).
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KEYWORD
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nonn,hard,more,new
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AUTHOR
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STATUS
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approved
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