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A027678 Squares composed of digits {2,4,8}. 3
4, 484, 28224, 228484, 8282884, 44484284288828484, 244848282488224248488284224, 2284884224228428242888448884484, 42884424422284228884248482424484, 448424228448248888288442822222282244, 424242448424484484244824228422488282244 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

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

LINKS

Table of n, a(n) for n=1..11.

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

P. De Geest, Palindromic Squares

H. Mishima, Sporadic tridigital solutions.

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, Square Number.

FORMULA

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

CROSSREFS

Cf. A027679.

Sequence in context: A053292 A053963 A053941 * A058442 A221242 A075411

Adjacent sequences:  A027675 A027676 A027677 * A027679 A027680 A027681

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

EXTENSIONS

One more term from Jon E. Schoenfield, Sep 04 2006

More terms from Mishima's page added by Max Alekseyev, Jan 28 2012

STATUS

approved

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Last modified August 24 06:49 EDT 2017. Contains 291052 sequences.