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A027678 Squares composed of digits {2,4,8}. 3


%S 4,484,28224,228484,8282884,44484284288828484,

%T 244848282488224248488284224,2284884224228428242888448884484,

%U 42884424422284228884248482424484,448424228448248888288442822222282244,424242448424484484244824228422488282244

%N Squares composed of digits {2,4,8}.

%D Ilan Vardi, Computational Recreations in Mathematica, Chapter 2, Exercise 2.2.

%H P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>

%H P. De Geest, <a href="http://www.worldofnumbers.com/square.htm">Palindromic Squares</a>

%H H. Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#248">Sporadic tridigital solutions</a>.

%H A. Ottens, <a href="http://einstein.et.tudelft.nl/~arlet/puzzles/sol.cgi/arithmetic/digits/squares/three.digits">The arithmetic-digits-squares-three.digits problem</a>

%H T. Sillke, <a href="http://www.mathematik.uni-bielefeld.de/~sillke/SEQUENCES/series002">What square consists entirely of three digits(e.g. 2,4 and 8)?</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SquareNumber.html">Square Number.</a>

%F a(n) = A027679(n)^2.

%Y Cf. A027679.

%K nonn,base

%O 1,1

%A _Patrick De Geest_

%E One more term from _Jon E. Schoenfield_, Sep 04 2006

%E More terms from Mishima's page added by _Max Alekseyev_, Jan 28 2012

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Last modified May 16 08:07 EDT 2021. Contains 343940 sequences. (Running on oeis4.)