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A136915 Numbers n such that n and the square of n use only the digits 0, 2, 5 and 7. 1
0, 5, 50, 500, 505, 755, 5000, 5005, 5050, 7550, 50000, 50005, 50050, 50500, 50505, 75500, 500000, 500005, 500050, 500500, 500505, 500755, 505000, 505050, 755000, 5000000, 5000005, 5000050, 5000500, 5000505, 5000755, 5005000, 5005005, 5005050, 5007550, 5025505, 5050000, 5050005, 5050500, 7550000, 7550005, 50000000, 50000005, 50000050 (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..1077

J. Wellons, Tables of Shared Digits

EXAMPLE

505050250050005^2 = 255075755075572575505000500025

CROSSREFS

Sequence in context: A266028 A228751 A299868 * A136918 A136910 A267663

Adjacent sequences:  A136912 A136913 A136914 * A136916 A136917 A136918

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified July 5 17:29 EDT 2020. Contains 335473 sequences. (Running on oeis4.)