A235816 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 columnwise and nonincreasing rowwise

2894, 87888, 2273170, 52510194, 1128547722, 22902973310, 445722551604, 8378893422154, 153271349524996, 2739947546255962, 48060566922825084, 829462448681057310, 14120165309292997170, 237536427227107162910

Offset

1,1

Comments

Column 2 of A235818

Links

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

Example

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

Crossrefs

Sequence in context: A061663 A205051 A262418 * A235819 A235575 A281657

Adjacent sequences: A235813 A235814 A235815 * A235817 A235818 A235819

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved