A237917 Number of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

9892, 133528, 1907520, 27873820, 405401852, 5873296416, 85701783182, 1241851571792, 18123171520244, 262625441797028, 3832538191826204, 55537509416257192, 810520201764017682, 11745382355662024760

Offset

1,1

Comments

Column 3 of A237921

Links

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

Example

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

Crossrefs

Sequence in context: A238076 A103810 A277944 * A205612 A205350 A187868

Adjacent sequences: A237914 A237915 A237916 * A237918 A237919 A237920

Keyword

nonn

Author

R. H. Hardin, Feb 15 2014

Status

approved