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%I #15 Sep 28 2023 14:31:20
%S 1,18,247,3060,36061,413478,4665907,52148520,579398521,6413737338,
%T 70833585967,781146772380,8606455783381,94767902627598,
%U 1043125151976427,11479124233250640,126303599496326641
%N Expansion of 1/((1-7x)(1-11x)).
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (18, -77).
%F ((9+sqrt4)^n - (9-sqrt4)^n)/4 in Fibonacci form. Offset 1. a(3)=247. - Al Hakanson (hawkuu(AT)gmail.com), Dec 31 2008
%F a(n) = 18*a(n-1) - 77*a(n-2). - _Philippe Deléham_, Jan 01 2009
%F a(n) = 11*a(n-1) + 7^n, a(0)=1. - _Vincenzo Librandi_, Feb 09 2011
%t Join[{a=1,b=18},Table[c=18*b-77*a;a=b;b=c,{n,40}]] (* _Vladimir Joseph Stephan Orlovsky_, Feb 09 2011 *)
%K nonn
%O 0,2
%A _N. J. A. Sloane_