A234165 - OEIS

A234165

Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).

%I #6 Jun 19 2022 01:46:02

%S 24158,208412,1773484,15427948,133660366,1183467658,10438586426,

%T 94449496104,849993735464,7882971512792,72513701669622,

%U 690714087534706,6499304028679962,63623536362231308,612011883415592408

%N Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2 (constant-stress 1 X 1 tilings).

%H R. H. Hardin, <a href="/A234165/b234165.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1:

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

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

%Y Column 4 of A234169.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 20 2013