%I A053726
%S A053726 5,8,11,13,14,17,18,20,23,25,26,28,29,32,33,35,38,39,41,43,44,46,47,48,
%T A053726 50,53,56,58,59,60,61,62,63,65,67,68,71,72,73,74,77,78,80,81,83,85,86,
%U A053726 88,89,92,93,94,95,98,101,102,103,104,105,107,108,109,110,111,113,116
%N A053726 "Flag numbers": number of dots that can be arranged in successive rows 
               of K, K-1, K, K-1, K, ..., K-1, K (assuming there is a total of L 
               > 1 rows of size K > 1).
%C A053726 If K=1, L=1 were allowed, this would contain all positive integers.
%F A053726 Numbers of the form F(K, L) = KL+(K-1)(L-1), K, L > 1, i.e. 2KL - (K+L) 
               + 1, sorted and duplicates removed.
%F A053726 Positive numbers > 1 but not of the form (odd primes plus one)/2. - Douglas 
               Winston (douglas.winston(AT)srupc.com), Sep 11 2003
%Y A053726 A008508(n) + n + 1.
%Y A053726 Sequence in context: A072524 A047700 A104275 this_sequence A161537 A022798 
               A022808
%Y A053726 Adjacent sequences: A053723 A053724 A053725 this_sequence A053727 A053728 
               A053729
%K A053726 nonn,easy
%O A053726 1,1
%A A053726 Dan Asimov, asimovd(AT)aol.com, Apr 09 2003
%E A053726 More terms from Douglas Winston (douglas.winston(AT)srupc.com), Sep 11 
               2003