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%I #22 Sep 26 2017 02:33:53
%S -9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,
%T 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,
%U 40,41,42,43,44,45,46,47,48,49,50,51
%N a(n) = n-9.
%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1).
%F G.f.: -(9-10*x)/(1-x)^2. - _Bruno Berselli_, Sep 02 2011
%F a(n) = 2 a(n-1) - a(n-2). a(n) = -A022965(n). - _M. F. Hasler_, Apr 18 2015
%p A023451 := n -> n-9; # _M. F. Hasler_, Apr 18 2015
%t Range[0,60]-9 (* _Harvey P. Dale_, Jan 15 2015 *)
%o (PARI) a(n)=n-9
%Y Cf. A256958, A001057, A000027, A001477, A023443, ..., A023450, A023452, ..., A023482, A022958, ..., A022996.
%Y The negative of A022965.
%K sign,easy
%O 0,1
%A _N. J. A. Sloane_.
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