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Search: id:A088110
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| A088110 |
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Numbers n such that 2^n + n as well as 2^n - n are noncomposite. |
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1
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OFFSET
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1,3
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COMMENT
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Conjecture: sequence is finite.
No more terms < 88075. - David Wasserman (wasserma(AT)spawar.navy.mil), Jul 20 2005
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EXAMPLE
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9 is a member as 2^9 + 9 = 521 as well as 2^9-9 = 503 are primes.
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CROSSREFS
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Cf. A052007, A048744.
Sequence in context: A162185 A063103 A058847 this_sequence A122759 A016626 A126321
Adjacent sequences: A088107 A088108 A088109 this_sequence A088111 A088112 A088113
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KEYWORD
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more,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 25 2003
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