%I #18 Jan 06 2014 17:47:31

%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,32,33,34,48,49,50,51,64,

%T 65,66,67,68,80,81,82,83,84,85,96,97,98,99,100,101,102,112,113,114,

%U 115,116,117,118,119,128,129,130,131,132,133,134,135,136,144,145

%N Nialpdromes: digits in base 16 are in nonincreasing order.

%H Vincenzo Librandi, <a href="/A023771/b023771.txt">Table of n, a(n) for n = 1..1000</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Digit.html">Digit.</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Nialpdrome.html">Nialpdrome.</a>

%t Select[Range[0, 500], Max[Differences[IntegerDigits[#, 16]]]<=0&] (* _Vincenzo Librandi_, Dec 27 2012 *)

%t Select[Range[0,145],GreaterEqual@@IntegerDigits[#,16]&] (* _Ray Chandler_, Jan 06 2014 *)

%K nonn,base,easy

%O 1,3

%A _Olivier Gérard_