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A058473
Numbers k such that k^2 contains only digits {0,1,9}, not ending with zero.
4
1, 3, 43694278824566964251, 100990098979999970099500001
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..4.
P. De Geest,
Index to related sequences
Hisanori Mishima,
Sporadic tridigital solutions
Zhao Hui Du,
Chinese BBS with updated data
CROSSREFS
Cf.
A058474
.
Sequence in context:
A058453
A058471
A068740
*
A115527
A050920
A001231
Adjacent sequences:
A058470
A058471
A058472
*
A058474
A058475
A058476
KEYWORD
nonn
,
base
,
hard
,
more
AUTHOR
Patrick De Geest
, Nov 15 2000
EXTENSIONS
a(4) from
Zhao Hui Du
, Feb 28 2024
STATUS
approved
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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)