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A028821 Numbers n such that n^2 has digits in nonincreasing order. 4
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 (list; graph; refs; listen; history; text; internal format)
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: A047360 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

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Last modified September 20 06:51 EDT 2020. Contains 337264 sequences. (Running on oeis4.)