A234987 - OEIS

A234987

Number of (n+1) X (4+1) 0..5 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 #7 Jun 19 2022 00:09:19

%S 7554,35598,206556,1525462,12242044,105948984,951853990,8853338774,

%T 84210673350,816873730308,8033167367750,79893700183320,

%U 800974540818196,8081147949233154,81903548032822434,833020114573408402

%N Number of (n+1) X (4+1) 0..5 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).

%C Column 4 of A234991.

%H R. H. Hardin, <a href="/A234987/b234987.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2:

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2014