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 A023089 #24 Feb 12 2021 01:25:50
%S A023089 0,142857,148257,174285,174825,1025748,1028574,1057428,1057482,
%T A023089 1082574,1085742,1402857,1408257,1420857,1425708,1425789,1425897,
%U A023089 1428057,1428570,1428579,1428597,1429785,1429857,1457028,1457082,1457829,1458297,1480257
%N A023089 Numbers k such that k and 5*k are anagrams.
%C A023089 All terms are divisible by 9. - _Eric M. Schmidt_, Jul 12 2014
%C A023089 This is Schuh's (1968) "quintuples puzzle". - _Petros Hadjicostas_, Jul 28 2020
%D A023089 Fred Schuh, The Master Book of Mathematical Recreations, Dover, New York, 1968, pp. 35-37.
%H A023089 David W. Wilson, <a href="/A023089/b023089.txt">Table of n, a(n) for n = 1..10001</a>
%t A023089 si[n_] := Sort@ IntegerDigits@ n; Flatten@{0, Table[Select[Range[10^d + 8, 2 10^d - 1, 9], si[#] == si[5 #] &], {d, 0, 6}]} (* _Giovanni Resta_, Mar 20 2017 *)
%Y A023089 Cf. A023086, A023087, A023088, A023090, A023091, A023092, A023093.
%K A023089 nonn,base
%O A023089 1,2
%A A023089 _David W. Wilson_