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A053915
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Squares composed of digits {1,8,9}.
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2
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1, 9, 81, 11881, 19881, 111999889, 1199998881, 1981191998999889, 11181188899981881, 889111189818189198888889, 18891818199881191889889889, 8819999189981919818818919999881
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..12.
P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
Author?, Source, (txt)
H. Mishima, Sporadic tridigital solutions
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FORMULA
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a(n) = A053914(n)^2.
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CROSSREFS
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Cf. A053914.
Sequence in context: A203107 A168493 A003302 * A067216 A076088 A061211
Adjacent sequences: A053912 A053913 A053914 * A053916 A053917 A053918
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KEYWORD
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nonn,base,more
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AUTHOR
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Patrick De Geest, Mar 15 2000
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EXTENSIONS
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One more term from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005
One more term from Jon E. Schoenfield, Sep 03 2006
One more term from Mishima's webpage added by Max Alekseyev, Jan 28 2012
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STATUS
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approved
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