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 A318535 #11 Aug 30 2018 04:22:46 %S A318535 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27, %T A318535 28,29,30,31,33,34,35,36,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52, %U A318535 53,55,56,57,58,59,60,61,62,63,64,66,67,68,69,70,71,72,73,74,75,77,78,79,80,81,82,83,84,85,86,88,89 %N A318535 Integers a(n) such that [a(n) - k] is a palindrome in base 10, with k <10. %C A318535 This is not the sequence A260255 although more than the first 111 terms are equal. %H A318535 Jean-Marc Falcoz, <a href="/A318535/b318535.txt">Table of n, a(n) for n = 1..10868</a> %e A318535 21 is not in the sequence because 11 (the closest palindromic integer < 21) is not reachable by subtracting an integer < 10 from 21. The integers 32, 43 or 2018 are not in the sequence for the same reason. %Y A318535 Cf. A318536 for an equivalent sequence [addition of (k < 10) instead of subtraction]. %Y A318535 Cf. A261906. %K A318535 base,nonn %O A318535 1,2 %A A318535 _Eric Angelini_ and _Jean-Marc Falcoz_, Aug 28 2018