%I A026242
%S A026242 1,1,2,3,2,4,3,5,6,4,7,8,5,9,6,10,11,7,12,8,13,14,9,15,16,10,
%T A026242 17,11,18,19,12,20,21,13,22,14,23,24,15,25,16,26,27,17,28,29,
%U A026242 18,30,19,31,32,20,33,21,34,35,22,36,37,23,38,24,39,40,25,41
%N A026242 a(n) = j if n is L(j), else a(n) = k if n is U(k), where L = A000201, 
               U = A001950 (lower and upper Wythoff sequences).
%F A026242 a(n) = a(m) if a(m) has already occurred exactly once and n = a(m) + 
               m, else a(n) = least positive integer that has not yet occurred.
%Y A026242 Also a(n) = |s(n) - n|, where s = A002251.
%Y A026242 Cf. A026272.
%Y A026242 Sequence in context: A026409 A085238 A026338 this_sequence A130526 A134834 
               A035583
%Y A026242 Adjacent sequences: A026239 A026240 A026241 this_sequence A026243 A026244 
               A026245
%K A026242 nonn,nice
%O A026242 1,3
%A A026242 Clark Kimberling (ck6(AT)evansville.edu)