A235021 - OEIS

A235021

Number of (n+1) X (3+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%I #7 Jun 20 2022 00:25:12

%S 1248,4312,14800,51220,177520,617600,2152744,7527124,26367488,

%T 92632604,326009192,1150507192,4067126368,14415310196,51176035576,

%U 182134771204,649220616600,2319643303000,8300224862256,29766948184132,106901780220416

%N Number of (n+1) X (3+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%H R. H. Hardin, <a href="/A235021/b235021.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A235021/a235021.txt">Empirical recurrence of order 63</a>

%F Empirical recurrence of order 63 (see link above).

%e Some solutions for n=4:

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

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

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

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

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

%Y Column 3 of A235026.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2014