A235558 Number of (n+1)X(3+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise

23024, 2481481, 269127070, 24006644081, 1779283912244, 111365596706324, 6085624918209802, 295666879948724250, 13027131423053574349, 526620669534920057107, 19765434730013023379418, 694125830476673627265551

Offset

1,1

Comments

Column 3 of A235559

Links

R. H. Hardin, Table of n, a(n) for n = 1..38

Example

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

Crossrefs

Sequence in context: A236039 A116062 A235778 * A104077 A199811 A230791

Adjacent sequences: A235555 A235556 A235557 * A235559 A235560 A235561

Keyword

nonn

Author

R. H. Hardin, Jan 12 2014

Status

approved