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.

A075213 Number of polyhexes with n cells that tile the plane isohedrally but not by translation or by 180-degree rotation (Conway criterion).

This page as a plain text file.
%I A075213 #10 Dec 05 2014 02:41:31
%S A075213 0,0,0,0,1,1,33,88,611,1803,2985,21250,23564,100221,392655,438188,
%T A075213 433150,4762862,2327445,18839643,46717154
%N A075213 Number of polyhexes with n cells that tile the plane isohedrally but not by translation or by 180-degree rotation (Conway criterion).
%C A075213 A tiling is isohedral if the symmetries of the tiling act transitively on the tiles; a shape is anisohedral if it tiles the plane, but not isohedrally.
%D A075213 Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.
%H A075213 Joseph Myers, <a href="http://www.polyomino.org.uk/mathematics/polyform-tiling/">Polyhex tiling</a>
%Y A075213 Cf. A070766, A075207, A075208, A075209, A075210, A075211, A075212, A075214, A075215, A075204, A075222.
%K A075213 hard,nonn
%O A075213 1,7
%A A075213 _Joseph Myers_, Sep 08 2002
%E A075213 More terms from _Joseph Myers_, Nov 08 2003
%E A075213 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007