%I A103461
%S A103461 1,9,101,999,10001,99999,1000001,9999999,100000001,999999999,10000000001,
%T A103461 99999999999,1000000000001,9999999999999,100000000000001,999999999999999,
%U A103461 10000000000000001,99999999999999999,1000000000000000001,9999999999999999999
%V A103461 1,-9,101,-999,10001,-99999,1000001,-9999999,100000001,-999999999,10000000001,
%W A103461 -99999999999,1000000000001,-9999999999999,100000000000001,-999999999999999,
%X A103461 10000000000000001,-99999999999999999,1000000000000000001,-9999999999999999999
%N A103461 (-10)^n+1-0^n.
%F A103461 G.f.: (1+10x^2)/((1-x)(1+10x)); a(n)=sum{k=0..n, binomial(n, k)*0^(k(n-k))*(-10)^k}.
%Y A103461 Sequence in context: A092936 A056002 A060150 this_sequence A101563 A007133 
               A083452
%Y A103461 Adjacent sequences: A103458 A103459 A103460 this_sequence A103462 A103463 
               A103464
%K A103461 easy,sign
%O A103461 0,2
%A A103461 Paul Barry (pbarry(AT)wit.ie), Feb 07 2005