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A257419 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0

%I #4 Apr 22 2015 10:36:41

%S 512,7652,117324,1770206,12316842,115919394,1037269100,6191314193,

%T 57799643410,478127487069,2903676329504,27615631745955,

%U 219195987569254,1325497215293808

%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

%C Diagonal of A257426

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A257426

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 22 2015

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)