A028821 Numbers k such that k^2 has digits in nonincreasing order.

0, 1, 2, 3, 8, 9, 10, 20, 21, 29, 30, 31, 80, 88, 90, 100, 200, 210, 290, 300, 310, 800, 880, 900, 1000, 2000, 2100, 2900, 2979, 3000, 3100, 3139, 8000, 8800, 9000, 10000, 20000, 21000, 29000, 29790, 30000, 31000, 31390, 31621, 80000, 88000

Offset: 1

Author

Patrick De Geest

Keywords

• nonn
• base

Links

• Ray Chandler, Table of n, a(n) for n = 1..108
• Patrick De Geest, Palindromic Squares in bases 2 to 17

Crossrefs

Cf. A028822.

Programs

Mathematica

Select[Range[0,10^5],GreaterEqual@@IntegerDigits[#^2]&] (* Ray Chandler, Jan 05 2014 *)

Extensions

Better name from Ray Chandler, Jan 05 2014