A236488 Number of (n+1)X(4+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise

26091, 2339313, 192914141, 14826588345, 1095464601321, 78726807207771, 5564322438106237, 389132366606307561, 27040769321739907771, 1871865092363761947679, 129286147695689699622959

Offset

1,1

Comments

Column 4 of A236490

Links

R. H. Hardin, Table of n, a(n) for n = 1..163

Example

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

Crossrefs

Sequence in context: A236080 A115494 A236493 * A235435 A250972 A235096

Adjacent sequences: A236485 A236486 A236487 * A236489 A236490 A236491

Keyword

nonn

Author

R. H. Hardin, Jan 27 2014

Status

approved