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Search: id:A088647
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| A088647 |
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a(1) = 1, then the smallest number such that the concatenation a(r), a(s) is prime for all s > r. |
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+0
2
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OFFSET
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0,3
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COMMENT
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Conjecture: sequence is finite.
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EXAMPLE
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a(5) = 73 as 173,373,773 are all prime.
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CROSSREFS
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Sequence in context: A094008 A078552 A091259 this_sequence A075611 A119572 A103737
Adjacent sequences: A088644 A088645 A088646 this_sequence A088648 A088649 A088650
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 29 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Aug 17 2005
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