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A234901 Primes which remain prime when the digits are rotated once to the right. 1
2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, 97, 113, 131, 173, 197, 199, 271, 277, 311, 313, 337, 373, 379, 397, 419, 479, 491, 571, 577, 593, 617, 631, 673, 719, 733, 811, 839, 877, 911, 919, 971, 977, 991, 1031, 1039, 1091, 1093, 1097, 1171, 1193, 1213 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Lars Blomberg, Table of n, a(n) for n = 1..10000

EXAMPLE

The prime 1097 is in the list because 7109 is also prime.

PROG

(PARI) rotr(a) = if(a<10, a, eval(Str(a%10, a\10)))

s=[]; forprime(n=2, 2000, if(isprime(rotr(n)), s=concat(s, n))); s

(MAGMA) r:=func<i | Seqint(Intseq(Floor(i/10)) cat Intseq(Intseq(i)[1]))>; [p: p in PrimesUpTo(1300) | IsPrime(r(p))]; // Bruno Berselli, Jul 04 2014

CROSSREFS

Cf. A227916, A227919.

Sequence in context: A007500 A090933 A107845 * A090934 A068652 A003459

Adjacent sequences:  A234898 A234899 A234900 * A234902 A234903 A234904

KEYWORD

nonn,base

AUTHOR

Colin Barker, Jan 01 2014

STATUS

approved

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Last modified January 22 07:31 EST 2022. Contains 350481 sequences. (Running on oeis4.)