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A250613 Number of (n+1)X(1+1) 0..2 arrays with nondecreasing maximum of every two consecutive values in every row and column 1
81, 484, 2704, 13456, 64009, 290521, 1283689, 5541316, 23541904, 98724096, 410022001, 1689785449, 6922406401, 28223328004, 114636416400, 464224195600, 1875379608025, 7561592527225, 30441493099161, 122399217842724 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A250620

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-1) -15*a(n-2) -70*a(n-3) +208*a(n-4) +148*a(n-5) -795*a(n-6) +15*a(n-7) +1267*a(n-8) -318*a(n-9) -840*a(n-10) +280*a(n-11) +176*a(n-12) -64*a(n-13)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A237082 A236651 A295018 * A237077 A236646 A205246

Adjacent sequences:  A250610 A250611 A250612 * A250614 A250615 A250616

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 2014

STATUS

approved

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Last modified October 20 15:15 EDT 2019. Contains 328267 sequences. (Running on oeis4.)