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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.
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%I #4 Mar 30 2012 18:56:06

%S 1,2,3,2,4,3,5,6,3,4,7,5,8,4,6,9,5,4,7,10,6,5,8,11,9,7,5,6,12,10,8,13,

%T 7,6,9,11,14,15,8,6,7,10,12,9,13,16,8,7,11,17,14,10,9,15,7,8,12,13,18,

%U 11,19,9,10,8,14,16,17,20,12,15,9,8,10,11,13

%N 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.

%K nonn

%O 1,2

%A _Clark Kimberling_