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%I #18 May 01 2017 09:18:36
%S 169,196,256,289,324,361,529,576,625,729,784,841,961,1156,1225,1521,
%T 1600,1681,2025,2116,2209,2500,3136,3364,3600,3844,3969,4225,4489,
%U 4624,4900,5625,5776,5929,6400,6561,6889,7225,8100,8281,8464,8836,9409,10201,10404
%N Squares which have one or more occurrences of exactly three different digits.
%C The first term having a repeated digit is 1156.
%H Giovanni Resta, <a href="/A235718/b235718.txt">Table of n, a(n) for n = 1..12299</a> (terms < 10^36, first 600 terms from Colin Barker)
%F a(n) = A054031(n)^2.
%e 5929 is in the sequence because 5929 = 77^2 and 5929 contains exactly three different digits: 2, 5 and 9.
%o (PARI) s=[]; for(n=1, 200, if(#vecsort(eval(Vec(Str(n^2))),,8)==3, s=concat(s, n^2))); s
%Y Cf. A235717, A235719-A235724, A225218.
%K nonn,base
%O 1,1
%A _Colin Barker_, Jan 15 2014
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