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A030098 Squares whose digits are all even. 5
0, 4, 64, 400, 484, 4624, 6084, 6400, 8464, 26244, 28224, 40000, 40804, 48400, 68644, 88804, 228484, 242064, 248004, 446224, 462400, 608400, 640000, 806404, 824464, 846400, 868624, 2022084, 2226064, 2244004, 2624400, 2822400, 2862864, 4000000, 4008004, 4080400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = A030097(n)^2. - Michel Marcus, Apr 03 2014

MATHEMATICA

t = {}; n = -1; While[Length[t] < 1000, n++; If[Intersection[IntegerDigits[n^2], {1, 3, 5, 7, 9}] == {}, AppendTo[t, n^2]]] (* T. D. Noe, Apr 03 2014 *)

Select[Range[0, 3000]^2, AllTrue[IntegerDigits[#], EvenQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Feb 19 2016 *)

CROSSREFS

Cf. A030097.

Subset of A075787.

Sequence in context: A249483 A165516 A064935 * A087045 A169801 A103751

Adjacent sequences:  A030095 A030096 A030097 * A030099 A030100 A030101

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified September 20 10:49 EDT 2020. Contains 337264 sequences. (Running on oeis4.)