A236272 Number of (n+1)X(2+1) 0..2 arrays with the upper median unequal to the lower median in every 2X2 subblock

208, 1770, 15434, 137142, 1226262, 11005062, 98896922, 889370642, 8000222410, 71974995478, 647568014134, 5826408486934, 52422934994538, 471676295256450, 4243925427421722, 38184920729995814, 343570793183657030

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