cp's OEIS Frontend

A151956 a(1) = 1002; 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 A151956 #4 Mar 30 2012 18:51:45
%S A151956 1002,2088,8532,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,
%T A151956 6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,
%U A151956 6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174,6174
%N A151956 a(1) = 1002; 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 A151956 For the list of fixed points see A099009.
%H A151956 <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a>
%Y A151956 Cf. A099009, A151947, A151949, A151950, A069746, A151955, A151951, A151957.
%K A151956 nonn,base
%O A151956 1,1
%A A151956 _Harvey P. Dale_, Aug 18 2009