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A238931 Number of (2+1)X(n+1) 0..3 arrays with no element greater than all horizontal neighbors or equal to all vertical neighbors 1
36, 864, 13090, 191086, 3025468, 48511734, 773430790, 12302664748, 195681771826, 3112430935472, 49506315426444, 787527376832916, 12528312743968620, 199302213997643582, 3170445669642515236, 50434269374897263770 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A238929

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Sequence in context: A001457 A203271 A004360 * A081142 A061694 A264192

Adjacent sequences:  A238928 A238929 A238930 * A238932 A238933 A238934

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 07 2014

STATUS

approved

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Last modified September 24 15:40 EDT 2021. Contains 347643 sequences. (Running on oeis4.)