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A058471
Numbers k such that k^2 contains only digits {7,8,9}.
1
3, 9949370777987917
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..2.
P. De Geest,
Index to related sequences
Hisanori Mishima,
Sporadic tridigital solutions
CROSSREFS
Cf.
A058472
.
Sequence in context:
A266199
A216148
A058453
*
A068740
A058473
A115527
Adjacent sequences:
A058468
A058469
A058470
*
A058472
A058473
A058474
KEYWORD
nonn
,
base
,
hard
,
more
,
bref
AUTHOR
Patrick De Geest
, Nov 15 2000
STATUS
approved
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Last modified September 2 15:48 EDT 2024. Contains 375613 sequences. (Running on oeis4.)