login
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
1
9892, 133528, 1907520, 27873820, 405401852, 5873296416, 85701783182, 1241851571792, 18123171520244, 262625441797028, 3832538191826204, 55537509416257192, 810520201764017682, 11745382355662024760
OFFSET
1,1
COMMENTS
Column 3 of A237921
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 15 2014
STATUS
approved