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A058471 Numbers k such that k^2 contains only digits {7,8,9}. 1
3, 9949370777987917 (list; graph; refs; listen; history; text; internal format)
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 May 21 14:18 EDT 2024. Contains 372738 sequences. (Running on oeis4.)