%I
%S 0,0,0,0,0,0,0,6,0,6,12,18,24,30,12,6,0,6,12,18,24,18,12,6,0,6,12,18,
%T 24,18,12,6,0,6,12,30,24,18,12,6,0,6,36,30,24,18,12,6,0,48,48,96,144,
%U 192,240,288,48,0,48,96,144,192,240,96,48,48,96,144,192,240,144,96,96,96
%N a(n) = image of n under the base7 Kaprekar map n > (n with digits sorted into descending order)  (n with digits sorted into ascending order)
%H Indranil Ghosh, <a href="/A165071/b165071.txt">Table of n, a(n) for n = 0..16807</a> (terms 0..2401 from Joseph Myers)
%H <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a>
%e For n = 11, 11_10 = 14_7. So, a(11) = 41_7  14_7 = 29  11 = 18.  _Indranil Ghosh_, Feb 02 2017
%t a[n_] := With[{dd = IntegerDigits[n, 7]}, FromDigits[ReverseSort[dd], 7]  FromDigits[Sort[dd], 7]];
%t a /@ Range[0, 100] (* _JeanFrançois Alcover_, Jan 08 2020 *)
%Y Cf. A165072.
%Y In other bases: A164884 (base 2), A164993 (base 3), A165012 (base 4), A165032 (base 5), A165051 (base 6), A165090 (base 8), A165110 (base 9), A151949 (base 10).
%K base,nonn
%O 0,8
%A _Joseph Myers_, Sep 04 2009
