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%I #12 Mar 15 2023 15:28:01
%S 18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,-1,-2,-3,-4,-5,-6,-7,
%T -8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18,-19,-20,-21,-22,-23,-24,
%U -25,-26,-27,-28,-29,-30,-31,-32,-33,-34,-35,-36,-37,-38,-39,-40,-41,-42
%N a(n) = 18-n.
%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 a(n) = 2*a(n-1) - a(n-2). - _Wesley Ivan Hurt_, Mar 15 2023
%t 18-Range[0,60] (* _Harvey P. Dale_, Jan 15 2012 *)
%K sign
%O 0,1
%A _N. J. A. Sloane_.
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