%N 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 C. Kimberling, "Fractal Sequences and Interspersions", Ars Combinatoria, vol. 45 p 157 1997.
%H T. D. Noe, <a href="/A023123/b023123.txt">Table of n, a(n) for n=1..1000</a>
%H C. Kimberling, <a href="http://faculty.evansville.edu/ck6/integer/intersp.html">Interspersions</a>
%A _Clark Kimberling_
%E The a(47) term was missing. Corrected by _T. D. Noe_, Aug 12 2008