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A234919 Number of (n+1) X (6+1) 0..4 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). 1

%I

%S 12360,47980,186500,990956,4834440,28854040,150606424,948274980,

%T 5093099972,33282246680,182453908840,1227449650312,6855533668528,

%U 47143909716212,268032385984924,1871592421095824,10821681133242880

%N Number of (n+1) X (6+1) 0..4 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="/A234919/b234919.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3:

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

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

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

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

%Y Column 6 of A234921.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 01 2014

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Last modified January 29 21:02 EST 2023. Contains 359931 sequences. (Running on oeis4.)