%I A004086
%S A004086 0,1,2,3,4,5,6,7,8,9,1,11,21,31,41,51,61,71,81,91,2,12,22,32,42,52,62,
%T A004086 72,82,92,3,13,23,33,43,53,63,73,83,93,4,14,24,34,44,54,64,74,84,94,5,
%U A004086 15,25,35,45,55,65,75,85,95,6,16,26,36,46,56,66,76,86,96,7,17,27,37,47
%N A004086 Read n backwards (referred to as R(n) in many sequences).
%C A004086 Also called digit reversal of n.
%C A004086 For n>0: a(a(n)) = n iff n mod 10 > 0. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               Mar 10 2002
%H A004086 Franklin T. Adams-Watters, <a href="b004086.txt">Table of n, a(n) for 
               n = 0..1000</a>
%p A004086 read transforms; A004086 := digrev;
%t A004086 Table[FromDigits[Reverse[IntegerDigits[n]]], {n, 0, 75}]
%o A004086 (PARI) digits(n) = {local(m,r);r=[];m=n;while(m>0,r=concat(m%10,r);m=floor(m/
               10));r}; A004086(n) = {local(b,m,r);r=0;b=1;m=digits(n);for(i=1,matsize(m)[2],
               r=r+b*m[i];b=b*10);r} [From Michael Porter (michael_b_porter(AT)yahoo.com), 
               Oct 16 2009]
%Y A004086 Sequence in context: A107603 A161594 A084011 this_sequence A121760 A061816 
               A083960
%Y A004086 Adjacent sequences: A004083 A004084 A004085 this_sequence A004087 A004088 
               A004089
%K A004086 nonn,base,nice
%O A004086 0,3
%A A004086 N. J. A. Sloane (njas(AT)research.att.com).
%E A004086 Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 30 2004