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A238283 Number of (n+1)X(3+1) 0..3 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors 1
50, 1844, 42084, 737366, 12926271, 245920800, 4810332239, 92790334588, 1767175335274, 33631393265283, 642245437813719, 12282485000914102, 234784249649799771, 4485361687341554225, 85682498512887615932 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A238287

LINKS

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

EXAMPLE

Some solutions for n=3

..1..2..2..2....2..3..3..1....0..1..1..0....0..1..2..2....3..3..3..3

..0..1..2..2....1..2..2..0....0..1..1..0....0..1..2..2....1..1..1..1

..0..1..2..2....0..2..2..0....1..3..3..0....3..3..2..2....1..1..1..0

..1..1..3..3....0..3..3..1....1..3..3..0....3..3..2..2....1..1..1..0

CROSSREFS

Sequence in context: A001241 A164986 A224121 * A240191 A231696 A285877

Adjacent sequences:  A238280 A238281 A238282 * A238284 A238285 A238286

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 22 2014

STATUS

approved

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Last modified January 29 05:09 EST 2022. Contains 350672 sequences. (Running on oeis4.)