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 A364632 #18 Apr 06 2025 20:46:46 %S A364632 1,4,727,84479,9935791,1204757533,141186107223,16785795917908, %T A364632 1990875917805852,235938457227641114,27983642750014402471, %U A364632 3317789294005871444981,393402890773982287366724,46647231741875687157655718,5531042470843072944881265311,655831959035571795593459804091 %N A364632 Number of tilings of an 8 X n rectangle using dominoes and trominoes (of any shape). %H A364632 Alois P. Heinz, <a href="/A364632/b364632.txt">Table of n, a(n) for n = 0..482</a> %H A364632 Wikipedia, <a href="https://en.wikipedia.org/wiki/Domino_(mathematics)">Domino (mathematics)</a>. %H A364632 Wikipedia, <a href="https://en.wikipedia.org/wiki/Tromino">Tromino</a>. %e A364632 a(1) = 4: %e A364632 ._. ._. ._. ._. %e A364632 | | | | | | | | %e A364632 |_| |_| | | | | %e A364632 | | | | |_| |_| %e A364632 |_| | | | | | | %e A364632 | | |_| |_| | | %e A364632 |_| | | | | |_| %e A364632 | | | | | | | | %e A364632 |_| |_| |_| |_| . %Y A364632 Column k=8 of A364457. %K A364632 nonn %O A364632 0,2 %A A364632 _Alois P. Heinz_, Jul 30 2023 %E A364632 Terms n>=4 had to be corrected as was pointed out by _Martin Fuller_ and _David Radcliffe_ - _Alois P. Heinz_, Apr 05 2025