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A053884
Numbers k such that k^2 contains only digits {1,2,7}.
1
1, 11, 1489, 4596489, 4144600242739, 130834904430015239
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..6.
P. De Geest,
Squares containing at most three distinct digits, Index entries for related sequences
Hisanori Mishima,
Sporadic tridigital solutions
CROSSREFS
Cf.
A053885
.
Sequence in context:
A160264
A351597
A076168
*
A027880
A222841
A287035
Adjacent sequences:
A053881
A053882
A053883
*
A053885
A053886
A053887
KEYWORD
nonn
,
base
,
more
,
changed
AUTHOR
Patrick De Geest
, Mar 15 2000
EXTENSIONS
One more term from
Jon E. Schoenfield
, Sep 03 2006
One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 23 2007
STATUS
approved
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Last modified August 20 23:19 EDT 2024. Contains 375341 sequences. (Running on oeis4.)