%I A023123
%S A023123 1,2,3,1,4,2,5,3,6,1,4,7,2,5,8,3,6,9,1,4,7,10,2,5,8,11,3,6,9,1,12,4,7,
%T A023123 10,2,13,5,8,11,3,14,6,9,1,12,4,15,7,10,2,13,5,16,8,11,3,14,6,17,9,1,12,
%U A023123 4,15,7,18,10,2,13,5,16,8,19,11,3,14,6,17,9,20,1,12,4,15,7,18,10,21,2
%N A023123 Signature sequence of e (arrange the numbers i+j*x (i,j >= 1) in increasing 
               order; the sequence of i's is the signature of x).
%D A023123 C. Kimberling, "Fractal Sequences and Interspersions", Ars Combinatoria, 
               vol. 45 p 157 1997.
%H A023123 T. D. Noe, <a href="b023123.txt">Table of n, a(n) for n=1..1000</a>
%H A023123 C. Kimberling, <a href="http://faculty.evansville.edu/ck6/integer/intersp.html">
               Interspersions</a>
%Y A023123 Sequence in context: A125159 A023119 A118276 this_sequence A023131 A026276 
               A152201
%Y A023123 Adjacent sequences: A023120 A023121 A023122 this_sequence A023124 A023125 
               A023126
%K A023123 nonn
%O A023123 1,2
%A A023123 Clark Kimberling (ck6(AT)evansville.edu)
%E A023123 The a(47) term was missing. Corrected by T. D. Noe (noe(AT)sspectra.com), 
               Aug 12 2008