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Number of (n+3) X (n+3) 0..1 arrays with no 4 X 4 subblock diagonal sum not equal the antidiagonal sum.
0

%I #6 Apr 18 2023 15:53:54

%S 17920,213920,1188294,2864828,2618602,1910774,918188,973994,798740,

%T 1339314,1508072,2300668,4527544

%N Number of (n+3) X (n+3) 0..1 arrays with no 4 X 4 subblock diagonal sum not equal the antidiagonal sum.

%C Diagonal of A258957.

%e Some solutions for n=1

%e ..0..0..1..1....1..0..0..0....1..0..0..0....0..0..0..0....1..0..1..0

%e ..0..1..0..1....1..0..1..0....1..1..1..1....0..0..1..0....1..0..0..0

%e ..0..1..1..0....0..0..1..0....0..1..0..1....0..0..1..0....1..1..0..1

%e ..1..0..1..1....1..1..0..0....0..1..1..0....1..1..1..1....0..0..1..0

%Y Cf. A258957.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 15 2015