cp's OEIS Frontend

A020663 Lexicographically earliest increasing sequence of nonnegative numbers that contains no arithmetic progression of length 10.

%I A020663 #17 Oct 01 2019 02:58:47
%S A020663 0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,
%T A020663 30,31,32,33,34,35,36,37,38,40,41,42,43,44,48,49,50,51,52,53,54,57,58,
%U A020663 59,60,61,62,63,64,65,67,68,69,70,71,72,73,74,76,77,80,81,82,83,84,87,88,95,96
%N A020663 Lexicographically earliest increasing sequence of nonnegative numbers that contains no arithmetic progression of length 10.
%H A020663 David W. Wilson, <a href="/A020663/b020663.txt">Table of n, a(n) for n = 1..10000</a>
%Y A020663 Summary of increasing sequences avoiding arithmetic progressions of specified lengths (the second of each pair is obtained by adding 1 to the first):
%Y A020663 3-term AP: A005836 (>=0), A003278 (>0);
%Y A020663 4-term AP: A005839 (>=0), A005837 (>0);
%Y A020663 5-term AP: A020654 (>=0), A020655 (>0);
%Y A020663 6-term AP: A020656 (>=0), A005838 (>0);
%Y A020663 7-term AP: A020657 (>=0), A020658 (>0);
%Y A020663 8-term AP: A020659 (>=0), A020660 (>0);
%Y A020663 9-term AP: A020661 (>=0), A020662 (>0);
%Y A020663 10-term AP: A020663 (>=0), A020664 (>0).
%K A020663 nonn
%O A020663 1,3
%A A020663 _David W. Wilson_