A237506 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1342, 9108, 62031, 462206, 3489965, 25188644, 180995914, 1323886040, 9750862216, 70896853212, 515780878618, 3760128852508, 27527933916550, 200444657289112, 1462699965537270, 10656195549646172, 77892908821912858, 567346977263750148

Offset

1,1

Comments

Column 3 of A237511

Links

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

Example

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

Crossrefs

Sequence in context: A023064 A252266 A253114 * A264385 A167437 A259675

Adjacent sequences: A237503 A237504 A237505 * A237507 A237508 A237509

Keyword

nonn

Author

R. H. Hardin, Feb 08 2014

Status

approved