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 A367440 #5 Nov 18 2023 13:22:31 %S A367440 1,1,1,2,4,7,18,46 %N A367440 Independence number of the polyomino graph PG(n) defined in A367435. %C A367440 Maximum size of a set of free polyominoes with n cells such that no polyomino in the set can be obtained from another by moving one of its cells, where the intermediate (the set of cells remaining when the cell to be moved is detached) is required to be a (connected) polyomino. %H A367440 Pontus von Brömssen, <a href="/A367440/a367440.svg">Maximum independent sets in the polyomino graph for 1 <= n <= 7</a>. %H A367440 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>. %F A367440 a(n) >= A367127(n). %Y A367440 Cf. A367127, A367435, A367436. %K A367440 nonn,more %O A367440 1,4 %A A367440 _Pontus von Brömssen_, Nov 18 2023