|
%I #6 Oct 01 2021 17:27:38
%S 1280,2640,16710,149364,2432344,52977162,2223220200,171503981892,
%T 20081331006806,3867096597138664,1162903308152378970,
%U 538715029223098678532
%N Number of (n+2) X (n+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2, 3, 6, or 7.
%C Diagonal of A251791.
%e Some solutions for n=4
%e ..2..2..1..1..2..2....0..3..2..0..2..2....0..0..0..0..0..0....0..3..1..0..3..2
%e ..3..3..3..3..3..3....1..3..1..0..3..1....2..2..1..1..2..2....3..1..0..3..1..0
%e ..0..0..0..0..0..0....0..3..2..0..3..2....3..3..3..3..3..2....2..0..3..2..0..3
%e ..1..2..1..2..1..2....0..3..1..0..3..1....0..0..0..0..0..1....0..3..2..0..3..2
%e ..3..3..3..3..3..3....0..3..2..0..3..2....2..1..2..2..1..1....3..1..0..3..1..0
%e ..0..0..0..0..0..0....1..3..1..0..3..1....3..3..3..3..3..3....2..0..3..1..0..3
%Y Cf. A251791.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 08 2014
| 