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A234997 Number of (n+1) X (6+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). 1

%I #6 Jun 20 2022 01:21:28

%S 1214044,12776172,147975544,2489486392,44177186020,914013128196,

%T 19044109453960,424531682715560,9414229379699100,217307773793647632,

%U 4988732357928242872,117937872645602844912,2779027403640520958532

%N Number of (n+1) X (6+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="/A234997/b234997.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=1:

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

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

%Y Column 6 of A234998.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2014

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)