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A007628 Reflectable emirps.
(Formerly M4892)
13

%I M4892 #20 Apr 03 2023 10:36:09

%S 13,31,113,311,1031,1033,1103,1181,1301,1381,1811,1831,3011,3083,3301,

%T 3803,10333,11003,11083,11833,18013,18133,18803,30011,30881,31033,

%U 31081,31183,33013,33181,33301,33811,38011,38113

%N Reflectable emirps.

%C Subsequence of A125308, the reflectable primes. - _Reinhard Zumkeller_, Jul 16 2014

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%D C. W. Trigg, "Reflective Primes", J. Rec. Math., 15 (1983), 251-256.

%H Reinhard Zumkeller, <a href="/A007628/b007628.txt">Table of n, a(n) for n = 1..10000</a>

%H Prime Glossary, <a href="https://t5k.org/glossary/xpage/ReflectablePrime.html">Reflectable prime</a>

%H C. W. Trigg, <a href="/A007628/a007628.pdf">Reflectable primes</a>, J. Recreational Mathematics 15.4 (1983), 253. (Annotated scanned copy)

%o (Haskell)

%o a007628 n = a007628_list !! (n-1)

%o a007628_list = filter f a125308_list where

%o f p = a010051' q == 1 && q /= p where q = a004086 p

%o -- _Reinhard Zumkeller_, Jul 16 2014

%Y Cf. A003684, A006567, A046732, A048051, A048052, A048053, A048054, A048895.

%Y Cf. A010051, A004086, A125308.

%K nonn,base,nice,easy

%O 1,1

%A _N. J. A. Sloane_, _Mira Bernstein_, _Robert G. Wilson v_

%E Missing 1811 inserted by _Reinhard Zumkeller_, Jul 16 2014

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)