This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A192141 #9 Aug 06 2024 02:06:09
%S A192141 2,3,2,5,7,2,3,11,101,11,131,151,181,191,313,7,353,373,383,727,383,
%T A192141 757,787,797,919,929,11,73137,101,10301,10501,10601,11311,11411,12421,
%U A192141 12721,12821,13331,13831,13931,14341,11,14741,15451,15551,16061,16361,16561,16661
%N A192141 Palindromic concatenation of prime divisors of numbers from A192140.
%e A192141 a(21) = 383 because A192140(21) = 747 = 3 * 83.
%t A192141 f[n_] := FromDigits[Flatten[IntegerDigits /@ FactorInteger[n][[;; , 1]]]]; f /@ Select[Range[2, 20000], And @@ (PalindromeQ /@ {#, f[#]}) &] (* _Amiram Eldar_, Aug 06 2024 *)
%Y A192141 Cf. A002113, A002385, A084317, A084092, A192137, A192138, A192139, A192140.
%K A192141 nonn,base
%O A192141 1,1
%A A192141 _Jaroslav Krizek_, Jun 24 2011
%E A192141 More terms from _Amiram Eldar_, Aug 06 2024