A237957 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

81, 1944, 81483, 7259122, 1421887147, 486414446352, 304213100538740, 404805739208682952

Offset

1,1

Comments

Diagonal of A237965

Links

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

Example

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

Crossrefs

Sequence in context: A225019 A224312 A224376 * A238038 A236088 A253448

Adjacent sequences: A237954 A237955 A237956 * A237958 A237959 A237960

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved