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A058471 Numbers n such that n^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 September 17 16:57 EDT 2019. Contains 327136 sequences. (Running on oeis4.)