login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103409 Numbers n such that n2357 is prime. 1

%I #12 Sep 08 2022 08:45:16

%S 0,9,14,17,20,23,24,35,36,38,56,57,59,65,66,71,80,89,90,92,93,99,104,

%T 114,119,125,132,141,143,149,152,156,189,191,203,204,215,227,234,243,

%U 245,252,255,258,264,267,273,275,279,281,290,293,303,311,314,317,332,344,357,362,365

%N Numbers n such that n2357 is prime.

%H Robert Israel, <a href="/A103409/b103409.txt">Table of n, a(n) for n = 1..10000</a>

%e n=56 is in the sequence because n2357 = 562357 is prime.

%e n=99 is in the sequence because n2357 = 992357 is prime.

%p select(t -> isprime(10000*t+2357), [$0..1000]); # _Robert Israel_, May 18 2017

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

%K base,nonn

%O 1,2

%A _Parthasarathy Nambi_, Mar 20 2005

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 16:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)