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 A340252 #14 Jan 09 2021 16:28:37
%S A340252 1,2,3,4,5,7,11,22,33,101,121,131,151,181,191,202,303,313,353,373,383,
%T A340252 727,757,787,797,919,929,1111,2222,10201,10301,10501,10601,11311,
%U A340252 11411,12221,12421,12721,12821,13331,13831,13931,14341,14741,15451,15551,16061,16361,16561,16661
%N A340252 Numbers whose pairwise products of divisors are all palindromic.
%C A340252 Supersequence of A002385 (palindromic primes).
%C A340252 A subsequence of A062687 (numbers all of whose divisors are palindromic).
%H A340252 Chai Wah Wu, <a href="/A340252/b340252.txt">Table of n, a(n) for n = 1..10000</a>
%e A340252 The pairwise products of the divisors of 22 (2,11,22,44,242) are all palindromic, so 22 is in the sequence.
%t A340252 fQ[n_]:=AllTrue[Union[Times@@@Subsets[Divisors[n],{2}]],PalindromeQ]; Select[Range[20000],fQ]
%Y A340252 Cf. A002385, A062687.
%K A340252 base,easy,nonn
%O A340252 1,2
%A A340252 _Ivan N. Ianakiev_, Jan 02 2021