A136983 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A136983

Numbers k such that k and k^2 use only the digits 1, 2, 3, 7 and 9.

1, 3, 11, 27, 111, 139, 173, 177, 373, 1139, 1339, 1927, 2777, 3373, 11123, 13123, 17123, 17923, 17927, 19777, 27927, 117123, 133123, 173139, 193373, 199277, 279177, 312911, 373139, 1127927, 1131339, 1312239, 1392739, 1712373, 1771777, 1771923, 1792739, 1799277, 1933177, 1977911, 1977923, 1993223, 1997927, 2792739, 3731927, 11122939

(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..313

J. Wellons, Tables of Shared Digits [archived]

EXAMPLE

373193291731927^2 = 139273232993711173339231133329.

CROSSREFS

Sequence in context: A113836 A036571 A003060 * A210611 A119074 A211810

Adjacent sequences: A136980 A136981 A136982 * A136984 A136985 A136986

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved