%I A023770
%S A023770 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,30,31,32,45,46,47,48,60,61,
%T A023770 62,63,64,75,76,77,78,79,80,90,91,92,93,94,95,96,105,106,107,108,
%U A023770 109,110,111,112,120,121,122,123,124,125,126,127,128,135,136,137
%N A023770 Nialpdromes: digits in base 15 are in descending order.
%Y A023770 Sequence in context: A124695 A005555 A128829 this_sequence A023797 A032951 
               A140823
%Y A023770 Adjacent sequences: A023767 A023768 A023769 this_sequence A023771 A023772 
               A023773
%K A023770 nonn,base,easy
%O A023770 0,3
%A A023770 Olivier Gerard (olivier.gerard(AT)gmail.com)