%I A020654
%S A020654 0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18,25,26,27,28,30,31,32,33,35,36,
%T A020654 37,38,40,41,42,43,50,51,52,53,55,56,57,58,60,61,62,63,65,66,67,68,75,
               76,
%U A020654 77,78,80,81,82,83,85,86,87,88,90,91,92,93,125,126,127,128,130,131,132
%N A020654 Sequence contains no 5-term arithmetic progression.
%Y A020654 Sequence in context: A087069 A023737 A037459 this_sequence A028804 A093480 
               A121518
%Y A020654 Adjacent sequences: A020651 A020652 A020653 this_sequence A020655 A020656 
               A020657
%K A020654 nonn
%O A020654 1,3
%A A020654 David W. Wilson (davidwwilson(AT)comcast.net)