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A235717
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Squares which have one or more occurrences of exactly two different digits.
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11
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16, 25, 36, 49, 64, 81, 100, 121, 144, 225, 400, 441, 484, 676, 900, 1444, 7744, 10000, 11881, 29929, 40000, 44944, 55225, 69696, 90000, 1000000, 4000000, 9000000, 9696996, 100000000, 400000000, 900000000, 6661661161, 10000000000, 40000000000, 90000000000
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OFFSET
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1,1
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COMMENTS
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The first term having a repeated digit is 100.
This sequence is the same as A018885, except that A018885 has four additional leading terms.
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LINKS
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FORMULA
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EXAMPLE
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69696 is in the sequence because 69696 = 264^2 and 69696 contains exactly two different digits: 6 and 9.
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PROG
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(PARI) s=[]; for(n=1, 10000, if(#vecsort(eval(Vec(Str(n^2))), , 8)==2, s=concat(s, n^2))); s
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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