A234994 - OEIS

A234994

Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%I #6 Jun 20 2022 01:57:15

%S 5280,32256,222672,1843956,16100096,147975544,1383273540,13136508448,

%T 125711250208,1212052600920,11747496084952,114450976252720,

%U 1119844141118852,11002825088380684,108500718690978524

%N Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234994/b234994.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2:

%e 4 1 2 3 3 6 5 6 4 2 3 2 0 2 0 1 2 3 6 0

%e 3 2 5 4 0 5 6 5 5 1 4 5 1 5 1 0 1 4 5 1

%e 2 3 4 5 3 6 5 2 6 4 5 4 4 6 0 1 2 3 6 4

%Y Column 3 of A234998.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2014