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 A204058 #8 Oct 30 2018 10:31:02 %S A204058 9876543210,4938271605,3291768054,2469135780,1975308642,1645839027, %T A204058 1409632875,1234567890,1097368245 %N A204058 Largest integer m such that both m and n*m are decimal pandigital numbers (A050278). %C A204058 Corresponding indices of a(n) in A050278 are 3265920, 1430987, 842972, 508475, 355944, 219427, 125670, 46234, 39091. %C A204058 Also corresponding values of n*a(n) are 9876543210, 9876543210, 9875304162, 9876543120, 9876543210, 9875034162, 9867430125, 9876543120, 9876314205. %Y A204058 Cf. A050278, A203987, A204045. %K A204058 nonn,base,fini,full %O A204058 1,1 %A A204058 _Zak Seidov_, Jan 10 2012