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 A204097 #9 Mar 30 2012 18:39:53
%S A204097 36492195078,48602175913,48613021759,49021758613,49130217586,
%T A204097 49219635078,53829197460,53829301746,53928301746,54601738293,
%U A204097 54601739283,58829301746,59288301746,60174538293,60174539283,60174588293,60174592883,64820935179
%N A204097 Numbers that are 6-persistent but not 7-persistent.
%C A204097 A number n is k-persistent iff all of {n, 2n,..., kn} are pandigital (in the sense of A171102).
%D A204097 Ross Honsberger, More Mathematical Morsels, Mathematical Association of America, 1991, pages 15-18.
%H A204097 Hans Havermann, <a href="/A204097/b204097.txt">Table of n, a(n) for n = 1..1000</a>
%Y A204097 Cf. A171102 (pandigital), A051264 (1-persistent), A051018 (2-persistent), A051019 (3-persistent), A051020 (4-persistent), A204096 (5-persistent), A204047 (smallest n-persistent).
%K A204097 nonn,base
%O A204097 1,1
%A A204097 _Hans Havermann_, Jan 10 2012