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A252057 Number of (n+2) X (n+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4. 0

%I #8 Oct 13 2021 00:52:40

%S 125,346,2349,30182,664938,23078709,1229012088,100756110010,

%T 12788352089472,2503090258367123,754443908148691278,

%U 350544406954555223319

%N Number of (n+2) X (n+2) 0..2 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 4.

%C Diagonal of A252065.

%e Some solutions for n=4

%e ..2..2..1..2..2..1....1..2..2..2..1..2....1..2..2..2..2..1....2..1..2..2..1..2

%e ..1..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..2..2....1..2..2..2..2..2

%e ..2..2..2..2..2..2....2..2..2..2..2..1....2..2..2..2..2..2....2..2..2..2..2..2

%e ..2..2..2..2..2..1....1..2..2..2..2..2....2..2..2..2..2..2....2..2..2..1..2..2

%e ..2..2..2..2..2..2....2..2..2..2..2..2....1..1..1..1..1..1....1..2..2..2..2..2

%e ..2..1..2..2..2..2....2..1..2..2..2..1....2..2..2..2..2..2....2..2..2..2..1..2

%Y Cf. A252065.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 13 2014

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)