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A207980 Number of nX4 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors) 0

%I

%S 15,1080,587208,953124784,3410310590912,22727131144960768,

%T 253335104721267417984

%N Number of nX4 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any diagonal or antidiagonal neighbor (colorings ignoring permutations of colors)

%C Column 4 of A207981

%e Some solutions for n=4

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

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

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

%e ..4..1..1..1....1..1..1..1....1..1..1..2....2..2..1..0....1..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 22 2012

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Last modified August 16 11:28 EDT 2022. Contains 356168 sequences. (Running on oeis4.)