A235825 Number of (2+1)X(n+1) 0..3 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

2896, 91067, 2623192, 66311937, 1570352593, 34846608905, 739650496878, 15108091788156, 299564452754368, 5794097242570815, 109830528586180045, 2047182453929500542, 37629995994579050559, 683660451068283310914

Offset

1,1

Comments

Row 2 of A235824

Links

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

Example

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

Crossrefs

Sequence in context: A234886 A236655 A235822 * A235580 A285756 A248109

Adjacent sequences: A235822 A235823 A235824 * A235826 A235827 A235828

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved