%I #31 Jul 01 2018 14:47:16
%S 5,6,7,8,10,11,12,13,15,16,17,18,23,24,26,27,28,30,32,33,35,36,37,38,
%T 40,41,42,43,48,50,51,53,55,56,57,58,60,61,62,63,65,66,67,68,75,76,77,
%U 78,80,81,82,83,85,86,87,88,90,91,92,93,104,108,112
%N Minimal span of set of n elements with no 5-term arithmetic progression.
%C If the first appearance of n in A003004 is A003004(k) = n, then a(n) = k-1. - _Fausto A. C. Cariboni_, Jun 17 2018
%H B. E. Brown and D. M. Gordon, <a href="http://dx.doi.org/10.1090/S0025-5718-96-00765-X">On sequences without geometric progressions</a>, Math. Comp. 65 (1996), no. 216, 1749-1754.
%H Sean A. Irvine, <a href="/A005049/a005049.out.txt">Example sets for a(5)-a(34)</a>
%Y Cf. A005047, A005048, A005050.
%K nonn,more
%O 5,1
%A _N. J. A. Sloane_
%E More terms from _David W. Wilson_, May 15 1997
%E a(24)-a(34) from _Sean A. Irvine_, Mar 16 2016
%E a(33) corrected by _Fausto A. C. Cariboni_, Jun 17 2018
%E a(35)-a(67) from _Fausto A. C. Cariboni_, Jun 17 2018