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A202912 Number of nX4 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 1
372, 1194376, 2397172032, 4062408076312, 7102116597811456, 12637286590945269232, 22397115742156661223732, 39623544474309263600520384, 70135184984660134580990756160, 124165374720618520973688261347828 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A202916

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..2..6..5..5....7..2..1..3....2..2..0..1....1..7..2..5....3..5..6..7

..5..6..2..7....7..6..2..3....5..0..7..4....1..7..1..5....1..3..0..7

..4..5..2..7....7..2..2..7....5..6..7..7....4..2..0..3....7..3..0..4

..0..0..3..3....1..1..2..7....3..0..3..4....4..0..2..2....7..3..7..7

CROSSREFS

Sequence in context: A299832 A203439 A265235 * A297383 A248799 A139659

Adjacent sequences:  A202909 A202910 A202911 * A202913 A202914 A202915

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 26 2011

STATUS

approved

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Last modified May 16 10:04 EDT 2022. Contains 353700 sequences. (Running on oeis4.)