login
Primes which are the reverse concatenation of three consecutive square numbers.
4

%I #7 Sep 21 2024 17:46:06

%S 941,25169,169144121,302529162809,110251081610609,166411638416129,

%T 497294928448841,580815760057121,930259241691809,123201122500121801,

%U 139129138384137641,140625139876139129,196249195364194481

%N Primes which are the reverse concatenation of three consecutive square numbers.

%H Harvey P. Dale, <a href="/A104302/b104302.txt">Table of n, a(n) for n = 1..1000</a>

%e The first term is 941 which is a prime and is the reverse concatenation of 1,4 and 9 which are three consecutive square numbers.

%t Select[FromDigits[Flatten[IntegerDigits/@#]]&/@(Reverse/@Partition[Range[500]^2,3,1]),PrimeQ] (* _Harvey P. Dale_, Sep 21 2024 *)

%K base,nonn

%O 1,1

%A _Shyam Sunder Gupta_, Apr 17 2005