A235575 Number of (n+1)X(2+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.

2894, 102188, 3103656, 82875972, 2014103692, 45287503606, 960171131904, 19390838361256, 376783995824816, 7089022103744966, 129887547400655616, 2327062746593565046, 40910982027733215718, 707691314157678278018

Offset

1,1

Comments

Column 2 of A235577

Links

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

Example

Some solutions for n=2
..2..2..1....2..2..1....1..1..1....3..0..2....0..2..3....2..1..2....2..3..2
..3..2..0....3..2..1....1..3..1....2..2..3....0..1..0....1..0..0....3..3..0
..1..0..0....0..0..2....3..3..1....1..2..2....0..3..0....2..1..1....2..3..1

Crossrefs

Sequence in context: A262418 A235816 A235819 * A281657 A234886 A236655

Adjacent sequences: A235572 A235573 A235574 * A235576 A235577 A235578

Keyword

nonn

Author

R. H. Hardin, Jan 12 2014

Status

approved