A136816 Numbers k such that k and k^2 use only the digits 0, 1, 2 and 4.

0, 1, 2, 10, 11, 12, 20, 21, 100, 101, 102, 110, 120, 200, 201, 210, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021, 1100, 1101, 1102, 1200, 1201, 2000, 2001, 2010, 2011, 2100, 2101, 10000, 10001, 10002, 10010, 10011, 10012, 10020, 10021, 10100, 10110, 10120, 10200, 10210, 11000, 11001, 11002, 11010, 11011, 11020, 12000, 12001, 12010, 20000, 20001

Offset

1,3

Comments

Generated with DrScheme.

Subsequence of A136817-A136821. - M. F. Hasler, Jan 24 2008

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1569

J. Wellons, Tables of Shared Digits [archived]

Example

21010001010^2 = 441420142440201020100.

Crossrefs

Sequence in context: A136821 A105116 A136819 * A188264 A169683 A134948

Adjacent sequences: A136813 A136814 A136815 * A136817 A136818 A136819

Keyword

base,nonn,changed

Author

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

Status

approved