

A253617


Number of (2+2)X(n+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order


1



8664, 131378, 1955619, 29206325, 438592379, 6586610559, 98874441146, 1484785130392, 22297719051563, 334849977802421, 5028613048594528, 75517616024925219, 1134092007833070215, 17031337435362085847
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=2
..0..0..0..1....0..0..1..1....0..0..0..1....0..0..0..0....0..0..1..1
..1..1..0..0....1..2..1..2....1..0..1..1....1..1..2..1....2..2..0..0
..2..1..1..1....0..2..0..0....2..2..0..0....0..1..1..0....0..2..2..1
..0..2..2..0....0..0..1..0....0..2..2..1....1..2..2..0....2..1..1..0


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



