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 A343452 #22 May 24 2021 07:54:46
%S A343452 0,10,20,30,40,50,60,70,80,90,100,200,300,400,500,600,700,800,900,
%T A343452 1000,1010,1020,1030,1040,1050,1060,1070,1080,1090,1100,1200,1300,
%U A343452 1400,1500,1600,1700,1800,1900,2000,2010,2020,2030,2040,2050,2060,2070,2080,2090
%N A343452 Numbers k such that A085942(k) = 0.
%C A343452 This sequence is the decimal analog of A140900.
%H A343452 Rémy Sigrist, <a href="/A343452/b343452.txt">Table of n, a(n) for n = 1..10000</a>
%e A343452 A085942(1020) = 1*0 + 0*2 + 2*0 + 0*1 = 0, so 1020 belongs to this sequence.
%e A343452 A085942(1021) = 1*1 + 0*2 + 2*0 + 1*1 = 2, so 1021 does not belong to this sequence.
%o A343452 (PARI) is(n) = { my (d=digits(n)); d*Colrev(d)==0 }
%Y A343452 Cf. A085942, A140900, A344511.
%K A343452 nonn,base
%O A343452 1,2
%A A343452 _Rémy Sigrist_, May 21 2021