A235580 Number of (n+1)X(2+1) 0..3 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.

2896, 100653, 3187679, 88558785, 2266703217, 53743314489, 1204872525582, 25761758641087, 530640585223234, 10596542672869573, 206322100962240719, 3933589245572314823, 73696129029630789335, 1360660167404660439759

Offset

1,1

Comments

Column 2 of A235582

Links

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

Example

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

Crossrefs

Sequence in context: A236655 A235822 A235825 * A285756 A248109 A219963

Adjacent sequences: A235577 A235578 A235579 * A235581 A235582 A235583

Keyword

nonn

Author

R. H. Hardin, Jan 12 2014

Status

approved