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A236272 Number of (n+1)X(2+1) 0..2 arrays with the upper median unequal to the lower median in every 2X2 subblock 1
208, 1770, 15434, 137142, 1226262, 11005062, 98896922, 889370642, 8000222410, 71974995478, 647568014134, 5826408486934, 52422934994538, 471676295256450, 4243925427421722, 38184920729995814, 343570793183657030 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236278

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) -189*a(n-3) +169*a(n-4) +720*a(n-5) -498*a(n-6) -680*a(n-7) +48*a(n-8) +48*a(n-9)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A233665 A233659 A230934 * A184681 A235674 A235444

Adjacent sequences:  A236269 A236270 A236271 * A236273 A236274 A236275

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2014

STATUS

approved

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Last modified August 2 21:30 EDT 2021. Contains 346429 sequences. (Running on oeis4.)