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A208362
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"2-ply" palindromic primes.
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1
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11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181, 18481, 19391, 19891, 19991, 30103, 30203, 30403, 30703, 30803, 31013, 31513, 32323, 32423
(list;
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refs;
listen;
history;
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internal format)
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OFFSET
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1,1
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COMMENTS
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From the Ribenboim book: palindromic primes whose base 10 length is a palindromic prime whose base 10 length is NOT a palindromic prime.
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REFERENCES
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Paulo Ribenboim, The New Book of Prime Number Records, Springer-Verlag New York Inc., 1996, pages 160-161.
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LINKS
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Table of n, a(n) for n=1..51.
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EXAMPLE
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11 is a palindromic prime of 2 digits, 2 is a palindromic prime of 1 digit, 1 is NOT a palindromic prime.
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CROSSREFS
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Cf. A002385, A208361 (base-10 length of these numbers), A208363 (palindromic primes with these as the base 10 lengths).
Sequence in context: A062696 A113654 A066592 * A159613 A062332 A222723
Adjacent sequences: A208359 A208360 A208361 * A208363 A208364 A208365
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KEYWORD
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nonn,base
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AUTHOR
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Alvin Hoover Belt, Feb 25 2012
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STATUS
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approved
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