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Nialpdromes: digits in base 13 are in nonincreasing order.
1

%I #14 Jan 06 2014 17:32:17

%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,26,27,28,39,40,41,42,52,53,54,55,

%T 56,65,66,67,68,69,70,78,79,80,81,82,83,84,91,92,93,94,95,96,97,98,

%U 104,105,106,107,108,109,110,111,112,117,118,119,120,121,122,123

%N Nialpdromes: digits in base 13 are in nonincreasing order.

%H Vincenzo Librandi, <a href="/A023768/b023768.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[0, 1000], Max[Differences[IntegerDigits[#, 13]]]<=0&] (* _Vincenzo Librandi_, Dec 26 2012 *)

%t Select[Range[0,123],GreaterEqual@@IntegerDigits[#,13]&] (* _Ray Chandler_, Jan 06 2014 *)

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_