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A137139 Numbers n such that n and the square of n use only the digits 4, 5, 6 and 7. 1
74, 76, 74476, 74474476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Generated with DrScheme

LINKS

Table of n, a(n) for n=1..4.

J. Wellons, Tables of Shared Digits

EXAMPLE

74474476^2 = 5546447575474576

CROSSREFS

Sequence in context: A114969 A104421 A136948 * A095569 A305265 A055111

Adjacent sequences:  A137136 A137137 A137138 * A137140 A137141 A137142

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified January 25 01:49 EST 2020. Contains 331229 sequences. (Running on oeis4.)