A137049 - OEIS

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A137049

Numbers k such that k and k^2 use only the digits 1, 4, 5, 7 and 8.

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 [archived]

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