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A136989 Numbers n such that n and the square of n use only the digits 1, 2, 4, 5 and 7. 1
1, 2, 5, 11, 12, 15, 21, 112, 211, 415, 421, 521, 715, 2271, 5211, 21271, 21715, 27412, 75771, 125521, 145415, 724412, 742412, 1127715, 1214171, 1475515, 2115211, 2125421, 2127715, 2171271, 2177511, 2177515, 4152412, 4174412, 4215771, 7171271, 7247421, 11145511, 12142715, 12547715, 14575415, 41441715, 41445415, 41542421, 41742715 (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..284

J. Wellons, Tables of Shared Digits

EXAMPLE

524545271212521^2 = 275147741551417212121547175441

CROSSREFS

Sequence in context: A136990 A136968 A136991 * A136987 A231336 A283473

Adjacent sequences:  A136986 A136987 A136988 * A136990 A136991 A136992

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified March 30 04:55 EDT 2017. Contains 284296 sequences.