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 A252425 Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 4 6 or 7. 0

%I

%S 641,688,1810,7575,85563,1190037,10924203,384953455,14875741975,

%T 235391624751,26396547463733,2950331202467754,75986516939085808,

%U 27838867253853706000,9086935218480182872031

%N Number of (n+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 4 6 or 7.

%C Diagonal of A252433.

%e Some solutions for n=4

%e ..3..0..1..3..0..1....3..2..2..3..2..2....3..0..1..3..3..1....3..2..2..0..2..2

%e ..3..2..2..3..2..2....2..3..2..2..0..2....0..2..2..3..2..2....2..3..2..2..3..2

%e ..2..3..2..2..3..2....3..3..1..3..3..1....2..3..2..2..0..2....3..3..1..3..3..1

%e ..0..3..1..3..3..1....3..2..2..3..2..2....3..3..1..3..3..1....0..2..2..3..2..2

%e ..3..2..2..0..2..2....2..3..2..2..0..2....3..2..2..3..2..2....2..3..2..2..3..2

%e ..2..0..2..2..3..2....0..3..1..3..3..1....2..3..2..2..3..2....3..0..1..3..0..1

%Y Cf. A252433.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2014

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Last modified March 25 08:54 EDT 2023. Contains 361520 sequences. (Running on oeis4.)