A137139 - OEIS

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A137139

Numbers k such that k and k^2 use only the digits 4, 5, 6 and 7.

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.

Jonathan Wellons, Tables of Shared Digits [archived]

EXAMPLE

74474476^2 = 5546447575474576.

CROSSREFS

Sequence in context: A104421 A352382 A136948 * A095569 A305265 A055111

Adjacent sequences: A137136 A137137 A137138 * A137140 A137141 A137142

KEYWORD

base,nonn,more

AUTHOR

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

STATUS

approved