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 A158304 Numbers k such that k^2 contains no digit greater than 4. 4
 0, 1, 2, 10, 11, 12, 18, 20, 21, 32, 38, 48, 49, 100, 101, 102, 110, 111, 120, 149, 152, 179, 180, 182, 200, 201, 210, 318, 320, 321, 332, 338, 348, 351, 361, 362, 380, 451, 452, 462, 480, 482, 490, 548, 549, 649, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 Erich Friedman, What's Special About This Number? MAPLE A158304 := proc(n) option remember; if n= 1 then 0; else for a from procname(n-1)+1 do d := convert(convert(a^2, base, 10), set) ; if max(op(d)) <= 4 then return a; end if; end do; end if; end proc: seq(A158304(n), n=1..100) ; # R. J. Mathar, May 23 2010 MATHEMATICA Select[Range[0, 1100], Max[IntegerDigits[#^2]]<5&] (* Harvey P. Dale, Nov 06 2016 *) CROSSREFS Cf. A158082, A136810. Sequence in context: A121717 A217072 A106518 * A007089 A159952 A136820 Adjacent sequences:  A158301 A158302 A158303 * A158305 A158306 A158307 KEYWORD nonn,base AUTHOR N. J. A. Sloane, May 23 2010 EXTENSIONS Extended by several correspondents, May 24 2010 STATUS approved

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Last modified July 1 19:07 EDT 2022. Contains 354974 sequences. (Running on oeis4.)