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A027678
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Squares composed of digits {2,4,8}.
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3
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4, 484, 28224, 228484, 8282884, 44484284288828484, 244848282488224248488284224, 2284884224228428242888448884484, 42884424422284228884248482424484, 448424228448248888288442822222282244, 424242448424484484244824228422488282244
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| Ilan Vardi, Computational Recreations in Mathematica, Chapter 2, Exercise 2.2.
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LINKS
| P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
P. De Geest, Palindromic Squares
A. Ottens, The arithmetic-digits-squares-three.digits problem
T. Sillke, What square consists entirely of three digits(e.g. 2,4 and 8)?
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
H. Mishima, Sporadic tridigital solutions.
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FORMULA
| a(n) = A027679(n)^2.
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CROSSREFS
| Cf. A027679.
Sequence in context: A053292 A053963 A053941 * A058442 A075411 A114763
Adjacent sequences: A027675 A027676 A027677 * A027679 A027680 A027681
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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EXTENSIONS
| One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 04 2006
More terms from Mishima's page added by Max Alekseyev (maxale(AT)gmail.com), Jan 28 2012
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