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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 31 22:45 EDT 2020. Contains 334756 sequences. (Running on oeis4.)