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A053915
Squares composed of digits {1,8,9}.
2
1, 9, 81, 11881, 19881, 111999889, 1199998881, 1981191998999889, 11181188899981881, 889111189818189198888889, 18891818199881191889889889, 8819999189981919818818919999881
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OFFSET
1,2
LINKS
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
FORMULA
a(n) =
A053914
(n)^2.
CROSSREFS
Cf.
A053914
.
Sequence in context:
A203107
A168493
A003302
*
A067216
A076088
A061211
Adjacent sequences:
A053912
A053913
A053914
*
A053916
A053917
A053918
KEYWORD
nonn
,
base
,
more
AUTHOR
Patrick De Geest
, Mar 15 2000
EXTENSIONS
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
STATUS
approved
