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!)
A167474 Primes p such that (p reversed)+10 is a square. 1

%I #10 Sep 08 2022 08:45:48

%S 17,431,1151,1979,6029,9323,11321,13877,17891,41597,45863,49193,62639,

%T 66851,68543,91151,99719,113147,117413,132533,136277,151631,153269,

%U 159839,174491,178397,199799,411101,419183,419777,437543,451637

%N Primes p such that (p reversed)+10 is a square.

%H Vincenzo Librandi, <a href="/A167474/b167474.txt">Table of n, a(n) for n = 1..200</a>

%e 17->71+10=9^2; 431->134+10=12^2; 1151->1511+10=39^2; 9323->3239+10=57^2.

%t Select[Prime[Range[460000]], IntegerQ[Sqrt[FromDigits[Reverse[ IntegerDigits[#]]] + 10]] &](* _Vincenzo Librandi_, Sep 15 2013 *)

%o (Magma) [p: p in PrimesInInterval(2,460000) | IsSquare(q+10) where q is Seqint(Reverse(Intseq(p)))]; // _Vincenzo Librandi_, Sep 15 2013

%K nonn,base,less

%O 1,1

%A _Vincenzo Librandi_, Nov 04 2009

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 April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)