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

1,3

Links

Ray Chandler, Table of n, a(n) for n = 1..108

P. De Geest, Palindromic Squares

Mathematica

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

Crossrefs

Cf. A028822.

Sequence in context: A378726 A004825 A272830 * A337261 A288740 A290150

Adjacent sequences: A028818 A028819 A028820 * A028822 A028823 A028824

Keyword

nonn,base

Author

Patrick De Geest

Extensions

Better name from Ray Chandler, Jan 05 2014

Status

approved