A007628 Reflectable emirps. (Formerly M4892)

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

1,1

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)

Prog

(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

Crossrefs

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

Cf. A010051, A004086, A125308.

Sequence in context: A044006 A179034 A179035 * A335787 A379482 A141837

Adjacent sequences: A007625 A007626 A007627 * A007629 A007630 A007631

Keyword

nonn,base,nice,easy

Author

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

Extensions

Missing 1811 inserted by Reinhard Zumkeller, Jul 16 2014

Status

approved