A235819 Number of (2+1)X(n+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

2894, 87888, 2287822, 52447112, 1113883030, 22196597522, 422920594570, 7766100008976, 138645436041864, 2418329907871922, 41404091421401562, 697988478843485434, 11617489583931774864, 191301863229644130672

Offset

1,1

Comments

Row 2 of A235818

Links

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

Example

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

Crossrefs

Sequence in context: A205051 A262418 A235816 * A235575 A281657 A234886

Adjacent sequences: A235816 A235817 A235818 * A235820 A235821 A235822

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved