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%I #7 Jan 06 2014 15:12:26
%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,30,31,45,46,47,60,61,62,63,75,
%T 76,77,78,79,90,91,92,93,94,95,105,106,107,108,109,110,111,120,121,
%U 122,123,124,125,126,127,135,136,137,138,139,140,141,142,143,150
%N Katadromes: digits in base 15 are in strict descending order.
%K nonn,base,fini,easy
%O 1,3
%A _Olivier Gérard_