%I #12 Apr 26 2021 19:46:20
%S 2,6,19,61,196,630,2026,6516,20957,67403,216786,697242,2242518,
%T 7212542,23197478,74609338,239963729,771787993,2482278087,7983674995,
%U 25677649398,82586237418,265619586324,854304141280,2747672247776
%N a(n) = 3*a(n-1)+a(n-2)-a(n-3)+a(n-6)-a(n-7)+a(n-10)-a(n-11).
%H <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (3, 1, -1, 0, 0, 1, -1, 0, 0, 1, -1).
%F G.f.: (2-x^10-x^6-x^2)/(1+x^11-x^10+x^7-x^6+x^3-x^2-3*x). [Maksym Voznyy (voznyy(AT)mail.ru), Aug 11 2009]
%K nonn
%O 0,1
%A _R. K. Guy_
%E Corrected by Franklin T. Adams-Watters, Oct 25 2006