A235662 Number of (n+1)X(2+1) 0..3 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise

3038, 105752, 3377510, 97225212, 2654051460, 69130583300, 1747603214578, 43136654198960, 1047132137240314, 25095456411611898, 595867012132487010, 14049371809599315902, 329547900284607478246, 7700165644063519174328

Offset

1,1

Comments

Column 2 of A235665

Links

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

Example

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

Crossrefs

Sequence in context: A145049 A108706 A235218 * A235666 A235427 A326416

Adjacent sequences: A235659 A235660 A235661 * A235663 A235664 A235665

Keyword

nonn

Author

R. H. Hardin, Jan 13 2014

Status

approved