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 A054032 Numbers n such that n^2 contains exactly 4 different digits. 10
 32, 33, 36, 37, 42, 43, 44, 48, 49, 51, 52, 53, 54, 55, 57, 59, 61, 64, 66, 69, 71, 72, 73, 74, 78, 79, 82, 84, 86, 87, 89, 93, 95, 96, 98, 99, 103, 104, 105, 106, 112, 114, 115, 123, 125, 127, 130, 132, 135, 138, 139, 140, 143, 145, 146, 151, 155, 156, 157, 158 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS T. D. Noe, Table of n, a(n) for n = 1..10000 MAPLE f := []; for i from 0 to 200 do if nops({op(convert(i^2, base, 10))})=4 then f := [op(f), i] fi; od; f; MATHEMATICA t = {}; n = -1; While[Length[t] < 50, n++; If[Length[Union[IntegerDigits[n^2]]] == 4, AppendTo[t, n]]] (* T. D. Noe, Apr 26 2013 *) PROG (PARI) is(n)=#Set(digits(n^2))==4 \\ Charles R Greathouse IV, Feb 11 2017 CROSSREFS Cf. A016069, A054031, A054033, A054034, A054035, A054036, A054037, A054038, A054039. Sequence in context: A108927 A242956 A085259 * A134843 A134844 A151983 Adjacent sequences: A054029 A054030 A054031 * A054033 A054034 A054035 KEYWORD nonn,base AUTHOR Asher Auel, Feb 29 2000 STATUS approved

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Last modified December 8 15:23 EST 2023. Contains 367680 sequences. (Running on oeis4.)