cp's OEIS Frontend

A151955 a(1) = 102; thereafter a(n) = (a(n-1) with digits sorted into descending order) - (a(n-1) with digits sorted into ascending order) (see the Kaprekar map, A151949).

%I A151955 #4 Mar 30 2012 18:51:45
%S A151955 102,198,792,693,594,495,495,495,495,495,495,495,495,495,495,495,495,
%T A151955 495,495,495,495,495,495,495,495,495,495,495,495,495,495,495,495,495,
%U A151955 495,495,495,495,495,495,495,495,495,495,495,495,495,495
%N A151955 a(1) = 102; thereafter a(n) = (a(n-1) with digits sorted into descending order) - (a(n-1) with digits sorted into ascending order) (see the Kaprekar map, A151949).
%C A151955 102 is the smallest starting value which does not converge to 0.
%C A151955 Converges to the fixed point 495. For the list of fixed points see A099009.
%H A151955 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a>
%Y A151955 Cf. A099009, A151946, A151949, A151947, A151957.
%K A151955 nonn,base
%O A151955 1,1
%A A151955 _Harvey P. Dale_. Aug 18 2009