%I A026409
%S A026409 1,2,3,2,4,3,5,6,3,4,7,5,8,4,6,9,5,4,7,10,6,5,8,11,9,7,5,6,12,
%T A026409 10,8,13,7,6,9,11,14,15,8,6,7,10,12,9,13,16,8,7,11,17,14,10,9,
%U A026409 15,7,8,12,13,18,11,19,9,10,8,14,16,17,20,12,15,9,8,10,11,13
%N A026409 For n >= 1, n n's take places at stage n: the first takes the least untaken 
               place (l.u.p) and for 2<=k<=n, the k-th n takes the l.u.p. more than 
               n-1 places past the place of the (k-1)st n.
%Y A026409 Sequence in context: A157893 A054384 A026400 this_sequence A085238 A026338 
               A026242
%Y A026409 Adjacent sequences: A026406 A026407 A026408 this_sequence A026410 A026411 
               A026412
%K A026409 nonn
%O A026409 1,2
%A A026409 Clark Kimberling (ck6(AT)evansville.edu)