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A137018 Numbers n such that n and the square of n use only the digits 1, 2, 7, 8 and 9. 1
1, 9, 11, 17, 27, 89, 91, 911, 989, 2777, 2827, 2877, 9911, 27877, 28127, 88189, 88277, 88877, 98989, 99891, 172891, 279127, 282827, 287891, 988877, 2879189, 9989891, 9998891, 29711811, 87919777, 88978189, 99899891, 112818127, 277817777, 277871911, 277987917, 278781777, 279781911, 287919777, 888812811, 1727112877, 2778718989 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Generated with DrScheme

LINKS

Jonathan Wellons, Table of n, a(n) for n=1..158

J. Wellons, Tables of Shared Digits

EXAMPLE

278787181898989^2 = 77722292791179979928199222121

CROSSREFS

Sequence in context: A108113 A111391 A077788 * A182391 A263722 A299971

Adjacent sequences:  A137015 A137016 A137017 * A137019 A137020 A137021

KEYWORD

base,nonn

AUTHOR

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

STATUS

approved

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Last modified January 20 08:07 EST 2020. Contains 331081 sequences. (Running on oeis4.)