A237973 Number of (n+1) X (7+1) 0..3 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.

5540337, 88114176, 1103412332, 24232087766, 564910605674, 12120042669700, 276807823136806, 6268997867878928, 141027677264715322, 3177869946651172644, 72112479542040048236, 1614631645540094145332, 36571068701325877630932

Offset

1,1

Comments

Column 7 of A237974.

Links

R. H. Hardin, Table of n, a(n) for n = 1..77

Example

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

Crossrefs

Cf. A237974.

Sequence in context: A253800 A158760 A206117 * A204528 A092019 A061164

Adjacent sequences: A237970 A237971 A237972 * A237974 A237975 A237976

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved