A056846 - cp's OEIS frontend

A056846 Number of polyominoids containing n squares: these are 2-dimensional polyominoes in a three-dimensional grid (edge-connected squares, like the floors, ceilings and walls of a building). Mirror images are distinguished.

%I A056846 #14 Jul 02 2025 16:02:00
%S A056846 1,2,11,80,780,8781,104828,1298506,16462696,212457221,2780615627,
%T A056846 36817036777
%N A056846 Number of polyominoids containing n squares: these are 2-dimensional polyominoes in a three-dimensional grid (edge-connected squares, like the floors, ceilings and walls of a building). Mirror images are distinguished.
%D A056846 R. A. Epstein, The Theory of Gambling and Statistical Logic, 1977, Academic Press, ISBN 0-12-240760-1 (pages 362-369 discuss polyforms, including Epstein's polyominoids).
%H A056846 M. Keller, <a href="http://www.solitairelaboratory.com/polyenum.html">Counting polyforms</a>
%Y A056846 Cf. A075679, A075678, A277565.
%K A056846 nonn,nice,more
%O A056846 1,2
%A A056846 _N. J. A. Sloane_, _James Sellers_, Aug 28 2000
%E A056846 Corrected and extended by _Joseph Myers_, Sep 24 2002

cp's OEIS Frontend

A056846 Number of polyominoids containing n squares: these are 2-dimensional polyominoes in a three-dimensional grid (edge-connected squares, like the floors, ceilings and walls of a building). Mirror images are distinguished.