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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
Sequence in context: A036266 A087722 A217005 * A011767 A305092 A205690
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Mar 20 2005
STATUS
approved

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Last modified July 13 08:08 EDT 2024. Contains 374274 sequences. (Running on oeis4.)