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A235240 Number of (n+1) X (n+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1 X 1 tilings). 0

%I

%S 210,3146,31858,338282,2965442,28726138,243061138,2245014658

%N Number of (n+1) X (n+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1 X 1 tilings).

%C Diagonal of A235248.

%e Some solutions for n=3

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

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

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

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

%Y Cf. A235248.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014

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Last modified October 23 04:06 EDT 2021. Contains 348211 sequences. (Running on oeis4.)