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A235257 Number of (n+1) X (7+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 0

%I #6 Jun 18 2022 23:45:52

%S 600928,1330480,2873128,7200188,17480904,47995084,126993640,373324260,

%T 1053946488,3264942732,9696780840,31291585876

%N Number of (n+1) X (7+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

%C Column 7 of A235258.

%e Some solutions for n=1:

%e 4 3 6 1 5 3 4 3 4 0 6 2 6 2 4 0 6 0 3 1 7 2 5 2

%e 0 6 2 4 1 6 0 6 2 5 4 7 4 7 2 5 4 5 1 6 5 7 3 7

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014

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Last modified April 24 04:02 EDT 2024. Contains 371918 sequences. (Running on oeis4.)