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A137049 Numbers k such that k and k^2 use only the digits 1, 4, 5, 7 and 8. 1
1, 88, 888, 4141, 7471, 7588, 8471, 8878, 418878, 747588, 758141, 4145771, 8478141, 41458141, 41818878, 41855488, 74485888, 718158141, 744411478, 747541141, 878148141, 887574141, 888154141, 4144585478, 7444115471, 8454854141, 8881151478, 74711811488, 75877847588, 84745157471, 84785445771, 88155858878, 88157571888 (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..77

J. Wellons, Tables of Shared Digits

EXAMPLE

718174181415471^2 = 515774154851781851481118151841.

CROSSREFS

Sequence in context: A136951 A136933 A136958 * A157730 A055749 A227479

Adjacent sequences:  A137046 A137047 A137048 * A137050 A137051 A137052

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified July 30 06:21 EDT 2021. Contains 346348 sequences. (Running on oeis4.)