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A103751 Squares whose digits are all positive and even. 0
4, 64, 484, 4624, 8464, 26244, 28224, 68644, 228484, 446224, 824464, 868624, 2862864, 8282884, 8868484, 22448644, 26646244, 44462224, 82228624, 82664464, 222248464, 284866884, 662444644, 866242624, 4246868224, 4444622224 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subset of A030098.

LINKS

Table of n, a(n) for n=1..26.

MAPLE

a:=proc(n) if convert(convert((n^2), base, 10), set) subset {2, 4, 6, 8} then n^2 else fi end:seq(a(n), n=1..100000);

MATHEMATICA

pevQ[n_]:=Module[{idn=IntegerDigits[n]}, FreeQ[idn, 0]&&And@@EvenQ[idn]]; Select[Range[70000]^2, pevQ] (* Harvey P. Dale, Jul 19 2013 *)

CROSSREFS

Cf. A030098.

Sequence in context: A030098 A087045 A169801 * A053959 A195800 A224446

Adjacent sequences:  A103748 A103749 A103750 * A103752 A103753 A103754

KEYWORD

nonn,base

AUTHOR

Emeric Deutsch, Mar 28 2005

STATUS

approved

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Last modified February 26 14:18 EST 2021. Contains 341632 sequences. (Running on oeis4.)