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A007628
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Reflectable emirps.
(Formerly M4892)
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13
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13, 31, 113, 311, 1031, 1033, 1103, 1181, 1301, 1381, 1811, 1831, 3011, 3083, 3301, 3803, 10333, 11003, 11083, 11833, 18013, 18133, 18803, 30011, 30881, 31033, 31081, 31183, 33013, 33181, 33301, 33811, 38011, 38113
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Subsequence of A125308, the reflectable primes. - Reinhard Zumkeller, Jul 16 2014
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
C. W. Trigg, "Reflective Primes", J. Rec. Math., 15 (1983), 251-256.
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LINKS
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Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Prime Glossary, Reflectable prime
C. W. Trigg, Reflectable primes, J. Recreational Mathematics 15.4 (1983), 253. (Annotated scanned copy)
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PROG
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(Haskell)
a007628 n = a007628_list !! (n-1)
a007628_list = filter f a125308_list where
f p = a010051' q == 1 && q /= p where q = a004086 p
-- Reinhard Zumkeller, Jul 16 2014
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CROSSREFS
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Cf. A003684, A006567, A046732, A048051, A048052, A048053, A048054, A048895.
Cf. A010051, A004086, A125308.
Sequence in context: A044006 A179034 A179035 * A141837 A299888 A023304
Adjacent sequences: A007625 A007626 A007627 * A007629 A007630 A007631
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KEYWORD
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nonn,base,nice,easy
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AUTHOR
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N. J. A. Sloane, Mira Bernstein, Robert G. Wilson v
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EXTENSIONS
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Missing 1811 inserted by Reinhard Zumkeller, Jul 16 2014
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STATUS
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approved
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