cp's OEIS Frontend

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.

A366009 Number of free polyominoids with n cells, allowing any corner-connections and right-angled edge-connections.

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%I A366009 #10 Nov 04 2023 18:24:39
%S A366009 1,3,30,531,13095
%N A366009 Number of free polyominoids with n cells, allowing any corner-connections and right-angled edge-connections.
%C A366009 See A365995 for further details and a table of related sequences.
%H A366009 Pontus von Brömssen, <a href="/A366009/a366009.svg">Illustration for sizes 1..3</a>.
%H A366009 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyominoid">Polyominoid</a>.
%H A366009 <a href="/index/Pol#polyominoes">Index entries for sequences related to polyominoes</a>.
%Y A366009 Cf. A365995, A366010 (fixed).
%Y A366009 29th row of A366766.
%K A366009 nonn,hard,more
%O A366009 1,2
%A A366009 _Pontus von Brömssen_, Sep 28 2023

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