

A262831


(5,2)primes (defined in Comments).


2



2, 3, 5, 11, 13, 23, 31, 41, 43, 53, 61, 71, 73, 83, 101, 103, 113, 131, 151, 163, 173, 181, 191, 223, 233, 241, 251, 263, 281, 293, 311, 313, 331, 373, 383, 401, 421, 433, 443, 461, 463, 491, 521, 523, 541, 563, 593, 631, 641, 653, 673, 683, 691, 701, 733
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OFFSET

1,1


COMMENTS

Let V = (b(1), b(2), ..., b(k)), where k > 1 and b(i) are distinct integers > 1 for j = 1..k. Call p a Vprime if the digits of p in base b(1) spell a prime in each of the bases b(2), ..., b(k).


LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000


MATHEMATICA

{b1, b2} = {2, 5};
u = Select[Prime[Range[6000]], PrimeQ[FromDigits[IntegerDigits[#, b1], b2]] &];
(* A235475 *)
v = Select[Prime[Range[6000]], PrimeQ[FromDigits[IntegerDigits[#, b2], b1]] &];
(* A262831 *)
w = Intersection[u, v]; (* A262832 *)
(* Peter J. C. Moses, 27 Sep 2015 *)


CROSSREFS

Cf. A000040, A262729, A262832, A262833.
Sequence in context: A180640 A128425 A175565 * A036960 A133783 A036958
Adjacent sequences: A262828 A262829 A262830 * A262832 A262833 A262834


KEYWORD

nonn,easy,base


AUTHOR

Clark Kimberling, Oct 31 2015


STATUS

approved



