

A103409


Numbers n such that n2357 is prime.


1



0, 9, 14, 17, 20, 23, 24, 35, 36, 38, 56, 57, 59, 65, 66, 71, 80, 89, 90, 92, 93, 99, 104, 114, 119, 125, 132, 141, 143, 149, 152, 156, 189, 191, 203, 204, 215, 227, 234, 243, 245, 252, 255, 258, 264, 267, 273, 275, 279, 281, 290, 293, 303, 311, 314, 317, 332, 344, 357, 362, 365
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


LINKS



EXAMPLE

n=56 is in the sequence because n2357 = 562357 is prime.
n=99 is in the sequence because n2357 = 992357 is prime.


MAPLE

select(t > isprime(10000*t+2357), [$0..1000]); # Robert Israel, May 18 2017


PROG

(Magma) [ n: n in [1..700]  IsPrime(Seqint([7, 5, 3, 2] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011 (misses the zero)


CROSSREFS



KEYWORD

base,nonn


AUTHOR



STATUS

approved



