The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A075238 Primes whose base 8 reversal is also prime. 7

%I

%S 2,3,5,7,13,29,31,41,43,47,59,61,67,71,73,79,89,97,101,107,113,193,

%T 211,227,233,239,251,349,353,373,383,449,457,463,479,487,491,503,509,

%U 521,523,541,577,587,643,677,683,719,733,751,757,773,787,811,823,827,829

%N Primes whose base 8 reversal is also prime.

%H Amiram Eldar, <a href="/A075238/b075238.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Harvey P. Dale)

%t Prime[ Select[ Range[150], PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[ # ], 8]], 8]] &]]

%t Select[Prime[Range[200]],PrimeQ[IntegerReverse[#,8]]&] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Jun 09 2017 *)

%Y Cf. A007500, A074832, A074833, A074834, A075235, A075236, A075237, A075239.

%K base,easy,nonn

%O 1,1

%A _Robert G. Wilson v_, Sep 09 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 3 22:03 EDT 2021. Contains 346441 sequences. (Running on oeis4.)