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 A235720 #15 Apr 18 2017 16:17:26 %S A235720 12769,13456,13689,13924,15376,15876,16384,17689,17956,18496,18769, %T A235720 20164,20736,21609,21904,23104,23409,23716,28561,29584,30276,30625, %U A235720 30976,31684,32041,32761,34596,35721,36481,37249,38025,38416,39204,39601,41209,43681,45369 %N A235720 Squares which have one or more occurrences of exactly five different digits. %C A235720 The first term having a repeated digit is 100489. %H A235720 Colin Barker, <a href="/A235720/b235720.txt">Table of n, a(n) for n = 1..1000</a> %F A235720 a(n) = A054033(n)^2. %e A235720 30976 is in the sequence because 30976 = 176^2 and 30976 contains exactly five different digits: 0, 3, 6, 7 and 9. %o A235720 (PARI) s=[]; for(n=1, 1200, if(#vecsort(eval(Vec(Str(n^2))),,8)==5, s=concat(s, n^2))); s %Y A235720 Cf. A235717-A235719, A235721-A235724, A225218. %K A235720 nonn,base %O A235720 1,1 %A A235720 _Colin Barker_, Jan 15 2014