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%I #4 Apr 22 2013 11:39:19
%S -1,-1,-1,-1,-1,-1,-1,-1,8,-1,-10,-19,-28,-37,-46,-55,-64,-73,17,8,-1,
%T -10,-19,-28,-37,-46,-55,-64,26,17,8,-1,-10,-19,-28,-37,-46,-55,35,26,
%U 17,8,-1,-10,-19,-28,-37,-46,44,35,26,17,8,-1,-10,-19,-28,-37,53,44,35
%N a(n)= n - reversal(n+1)
%C a(8)=8-R(9)=8-9=-1; a(15)=15-R(16)=15-61=-46; a(27)=27-R(28)=27-82=-55
%t #[[1]]-FromDigits[Reverse[IntegerDigits[#[[2]]]]]&/@Partition[Range[70],2,1] (* _Harvey P. Dale_, Apr 22 2013 *)
%K base,sign
%O 1,9
%A _Claudio Meller_, May 30 2009