This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A352432 #15 Jan 14 2023 12:41:34 %S A352432 1,1,11,29,165,593,2773,11093,48605,201829,864901,3638261,15472261, %T A352432 65377669,277294885,1173523013,4972873413,21056700293,89200845765, %U A352432 377774394309,1600161267781,6777276186821,28705824305861,121582507360709 %N A352432 Number of tilings of a 4 X n rectangle using dominoes and 2 X 2 tiles. %C A352432 The sequence is based on A352431. %H A352432 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (3,10,-18,-14,20). %F A352432 G.f.:(1 - 2*x - 2*x^2 + 4*x^3)/(1 - 3*x - 10*x^2 + 18*x^3 + 14*x^4 - 20*x^5). %F A352432 a(n) = 3*a(n-1) + 10*a(n-2) - 18*a(n-3) - 14*a(n-4) + 20*a(n-5). %e A352432 a(2)=11: %e A352432 ___ ___ ___ ___ ___ ___ %e A352432 | | | | | | | | | |___| |___| %e A352432 |___| |___| |___| |_|_| |___| |___| %e A352432 | | | | | |___| | | | | |___| %e A352432 |___| |_|_| |___| |___| |___| |___| %e A352432 . %e A352432 ___ ___ ___ ___ ___ %e A352432 |___| | | | |___| |___| | | | %e A352432 | | |_|_| | | | |___| |_|_| %e A352432 |___| | | | |_|_| | | | |___| %e A352432 |___| |_|_| |___| |_|_| |___| %Y A352432 Cf. A352431, A352433. %K A352432 nonn %O A352432 0,3 %A A352432 _Gerhard Kirchner_, Mar 17 2022