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

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

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

Examples

			21010001010^2 = 441420142440201020100.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..1569
• J. Wellons, Tables of Shared Digits [archived]