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 A334416 #36 Jun 20 2021 02:26:21 %S A334416 1,2,3,4,5,6,7,8,9,12,18,21,24,27,36,42,45,48,54,63,72,81,84,110,132, %T A334416 198,220,264,330,396,440,550,594,605,660,715,770,792,825,880,935,990, %U A334416 1010,1056,1188,1212,1310,1386,1452,1584,1782,1810,1812,1815,1818,1848 %N A334416 Numbers m such that (m / sum of digits of m) is a palindrome. %C A334416 Not to be confused with A114440 whose first 23 terms are identical to the terms of this sequence, while A114440(24) = 108 and a(24) = 110. %H A334416 Giovanni Resta, <a href="/A334416/b334416.txt">Table of n, a(n) for n = 1..10000</a> %H A334416 <a href="/index/Pac#palindromes">Index entries for sequences related to palindromes</a> %e A334416 The number 264 is a term of the sequence because it is divisible by the sum of its digits: 2+6+4=12; 264/12=22 and 22 is a palindrome. %t A334416 Select[Range[2000], PalindromeQ[# / Plus @@ IntegerDigits[#]] &] (* _Amiram Eldar_, Apr 28 2020 *) %o A334416 (PARI) isok(m) = iferr(my(d=digits(m/sumdigits(m))); d==Vecrev(d), E, 0); \\ _Michel Marcus_, Apr 29 2020 %Y A334416 Cf. A001101 (similar for primes). %Y A334416 Cf. A334417 (resulting palindromic quotients). %Y A334416 Subsequence of A005349 (Niven (or Harshad) numbers). %Y A334416 Subsequence: A276142 (palindromic terms). %K A334416 nonn,base %O A334416 1,2 %A A334416 _Bernard Schott_, Apr 28 2020