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 A223081 #14 Jul 04 2021 14:49:49 %S A223081 1,2,3,4,5,6,7,8,9,1089,2178,21978 %N A223081 Numbers n with distinct digits such that n divides the reversal of n. %C A223081 The definition implies that n does not end in 0. %C A223081 There are no terms with 6 digits. %C A223081 Sequence is complete. - _Giovanni Resta_, Mar 20 2013 %t A223081 Select[FromDigits/@(Flatten[Permutations/@Subsets[Range[0,9],5],1]), Divisible[ IntegerReverse[#],#]&]//Quiet//Union (* _Harvey P. Dale_, Jan 12 2020 *) %Y A223081 Cf. A214927, A223080, A223082, A222810. %K A223081 nonn,fini,full,base %O A223081 1,2 %A A223081 _N. J. A. Sloane_, Mar 20 2013