

A234390


Number of (n+2)X(2+2) 0..3 arrays with no increasing sequence of length 3 horizontally or diagonally downwards


1



10683130, 1687142836, 252617381130, 37540308719262, 5540782611170014, 816701376137485043, 120273769124195306186, 17708686303582891399354, 2607060592375039875597040, 383797384931913109490872473
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=1
..0..0..1..2....0..0..1..0....0..0..0..1....0..0..1..1....0..0..0..2
..0..3..0..1....0..0..2..1....0..1..3..0....2..3..3..2....2..2..0..3
..0..0..1..0....2..2..0..1....0..0..1..3....0..1..0..2....0..2..1..3


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



