A235666 Number of (2+1) X (n+1) 0..3 arrays with the difference between each 2 X 2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.

3038, 105752, 3405756, 98555090, 2711168860, 71121044662, 1810928557276, 44992556226908, 1098636100890368, 26463799388634494, 631069393721184736, 14932511035514783692, 351283388673654775074, 8227223033013741388748

Offset

1,1

Comments

Row 2 of A235665.

Links

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

Example

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

Crossrefs

Cf. A235665.

Sequence in context: A108706 A235218 A235662 * A235427 A326416 A236297

Adjacent sequences: A235663 A235664 A235665 * A235667 A235668 A235669

Keyword

nonn

Author

R. H. Hardin, Jan 13 2014

Status

approved