A251029 Number of (n+1) X (n+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

110, 6089, 422538, 32439684, 2592092409, 213854374926, 17881871080466, 1526776149775282

Offset

1,1

Comments

Diagonal of A251037.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A251037.

Sequence in context: A008395 A201213 A250528 * A111600 A111784 A146495

Adjacent sequences: A251026 A251027 A251028 * A251030 A251031 A251032

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved