A136821 Numbers k such that k and k^2 use only the digits 0, 1, 2, 4 and 9.

0, 1, 2, 10, 11, 12, 20, 21, 49, 100, 101, 102, 110, 120, 149, 200, 201, 210, 212, 490, 499, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021, 1049, 1100, 1101, 1102, 1200, 1201, 1411, 1421, 1429, 1490, 2000, 2001, 2010, 2011, 2100, 2101, 2120, 4499, 4900, 4990, 4999, 10000, 10001, 10002, 10010, 10011, 10012, 10020, 10021, 10100, 10110, 10120, 10200, 10210

Offset: 1

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

Examples

			490940149^2 = 241022229900142201.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..1064
• J. Wellons, Tables of Shared Digits [archived]