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A202264
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Noncomposite numbers in which all substrings and reversal substrings are noncomposites.
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2
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1, 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 113, 131, 311, 313, 373
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internal format)
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OFFSET
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1,2
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COMMENTS
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Sequence is finite with 17 terms.
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LINKS
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EXAMPLE
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All substrings and reversal substrings of 311 are noncomposites: 1, 3, 11, 13, 31, 113, 311.
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CROSSREFS
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Cf. A202263 (primes in which all substrings and reversal substrings are primes), A202265 (nonprimes in which all substrings and reversal substrings are nonprimes), A202266 (composite numbers in which all substrings and reversal substrings are composites).
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KEYWORD
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nonn,base,fini,full
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AUTHOR
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STATUS
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approved
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