A086832 - cp's OEIS frontend

A086832 Number of ways to tile an n X n board having a black border with the following 1 X 1 tiles: bbbb, bbww, wbbw, bwwb, wwbb, where the colors are read clockwise around each tile.

%I A086832 #1 Sep 13 2003 03:00:00
%S A086832 1,2,5,36,324,7041,233265,16038658,1884307184,426645198097,
%T A086832 173238487743952
%N A086832 Number of ways to tile an n X n board having a black border with the following 1 X 1 tiles: bbbb, bbww, wbbw, bwwb, wwbb, where the colors are read clockwise around each tile.
%C A086832 A valid tiling is one in which black touches black and white touches white.
%K A086832 nonn
%O A086832 1,2
%A A086832 Aaron M. Balog (ambalog(AT)ucdavis.edu), Aug 07 2003

cp's OEIS Frontend

A086832 Number of ways to tile an n X n board having a black border with the following 1 X 1 tiles: bbbb, bbww, wbbw, bwwb, wwbb, where the colors are read clockwise around each tile.