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 A288356 #8 Jun 11 2017 12:39:51 %S A288356 169896,174171,174767,174787,185878,185898,191581,191691,194191, %T A288356 194878,194989,195191,195898,195987,195989,196191,196989,565856, %U A288356 569565,595759,658565,673676,674767,676967,698961,714878,767471,767476,769676,783787,783878,785878,787378,787387,789498,814787,814878 %N A288356 Strings of 6 digits from 1...9, such that no formula using the single digits in the given order exists that evaluates to 0. %C A288356 For definitions and comments see A288350. The b-file provides all A288351(6)=89 sequence terms. %H A288356 Hugo Pfoertner, <a href="/A288356/b288356.txt">Table of n, a(n) for n = 1..89</a> %Y A288356 Cf. A288350, A288351, A288353, A288354, A288355. %K A288356 nonn,base,fini,full %O A288356 1,1 %A A288356 _Hugo Pfoertner_, Jun 08 2017