A137050 - OEIS

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A137050

Numbers k such that k and k^2 use only the digits 1, 4, 5, 7 and 9.

1, 7, 771, 95915479, 1414114479, 9549447479, 9997777479, 44175549479, 444714977479, 744411947479, 7719779447479, 9755999159479, 9795711159479, 9955779977479, 9974955915479, 9975759415479, 44711911155479, 77174797777479, 99571459159479, 757941917114479, 957974171959479, 999597777979479, 999747957114479

(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..24

J. Wellons, Tables of Shared Digits [archived]

EXAMPLE

957974171959479^2 = 917714514141449441154417951441.

CROSSREFS

Sequence in context: A248385 A242826 A112904 * A114911 A162089 A020470

Adjacent sequences: A137047 A137048 A137049 * A137051 A137052 A137053

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved