A007628 Reflectable emirps.

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

Offset: 1

Author

N. J. A. Sloane, Mira Bernstein, Robert G. Wilson v

Keywords

• nonn
• base
• nice
• easy

Comments

Subsequence of A125308, the reflectable primes. - Reinhard Zumkeller, Jul 16 2014

References

• 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.

Links

• 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)

Crossrefs

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

Cf. A010051, A004086, A125308.

Programs

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

Extensions

Missing 1811 inserted by Reinhard Zumkeller, Jul 16 2014