%I A061601
%S A061601 9,8,7,6,5,4,3,2,1,0,89,88,87,86,85,84,83,82,81,80,79,78,77,76,75,74,
%T A061601 73,72,71,70,69,68,67,66,65,64,63,62,61,60,59,58,57,56,55,54,53,52,51,
%U A061601 50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28
%N A061601 9's complement of n: a(n) = 10^d - 1 - n where d is the number of digits 
               in n. If a is a digit in n replace it with 9 - a.
%C A061601 Also anti-nine numbers. - Cino Hilliard (hillcino368(AT)gmail.com), Mar 
               11 2006
%D A061601 Kjartan Poskitt, Murderous Maths: Numbers, The Key to the Universe, Scholastic 
               Ltd, 2002. See p 159.
%H A061601 Harry J. Smith, <a href="b061601.txt">Table of n, a(n) for n=0,...,1000</
               a>
%H A061601 Matthew M. Conroy, <a href="http://www.madandmoonly.com/doctormatt">Home 
               page</a> (listed instead of email address)
%e A061601 a(7) = 2 = 10 - 1 -7. a(123) = 1000 -1 -123 = 876.
%o A061601 (PARI) g(n) = for(x=0,n,ln=length(Str(x));y=10^ln-1 - x;print1(y",")) 
               - Cino Hilliard (hillcino368(AT)gmail.com), Mar 11 2006
%o A061601 (PARI) { for (n=0, 1000, ln=length(Str(n)); write("b061601.txt", n, " 
               ", 10^ln - 1 - n) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Jul 25 2009]
%Y A061601 Sequence in context: A023451 A109910 A084019 this_sequence A098756 A112454 
               A138531
%Y A061601 Adjacent sequences: A061598 A061599 A061600 this_sequence A061602 A061603 
               A061604
%K A061601 nonn,base,easy
%O A061601 0,1
%A A061601 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 19 2001
%E A061601 Corrected and extended by Matthew M. Conroy, Jan 19 2002