A236493 Number of (4+1)X(n+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise

26091, 2330087, 192685833, 14826588345, 1098468030593, 79148954230787, 5608106012296057, 392998922033423091, 27352966322984607571, 1895677299526633150487, 131037228259070666307047

Offset

1,1

Comments

Row 4 of A236490

Links

R. H. Hardin, Table of n, a(n) for n = 1..188

Example

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

Crossrefs

Sequence in context: A235740 A236080 A115494 * A236488 A235435 A250972

Adjacent sequences: A236490 A236491 A236492 * A236494 A236495 A236496

Keyword

nonn

Author

R. H. Hardin, Jan 27 2014

Status

approved