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A092591
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Exponents at which 1+A063395[2^n] is a power of 2.
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0
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1, 2, 3, 4, 6, 7, 12, 15, 16, 18, 30, 31, 60, 88, 106, 126
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OFFSET
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1,2
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COMMENTS
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Numbers n such that A065395[n]=sigma[phi[n]]-phi[sigma[n]].
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LINKS
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Table of n, a(n) for n=1..16.
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EXAMPLE
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At exponents n=1, 3, 7, 15, 31: A065395[2^n]+1=2, while at n=2, 4, 6, 12, 16, 18, 30, 60, 88, 106, 126: A065395[2^n]+1=2^n
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CROSSREFS
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Cf. A000203, A000010, A065395, A092584-A092590.
Sequence in context: A018534 A018276 A057732 * A039947 A096477 A039059
Adjacent sequences: A092588 A092589 A092590 * A092592 A092593 A092594
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Mar 03 2004
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STATUS
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approved
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