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A188305 Number of (n+1)X4 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums 1
36, 664, 3784, 30096, 203584, 1514522, 10660334, 77627954, 553295656, 3999339740, 28648406172, 206430645818, 1481793194338, 10663317931808, 76610286157360, 550993785392346, 3960074619398180, 28474664232145762, 204684231700055702 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A188311

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 3X4

..1..0..1..1....1..1..1..1....0..1..1..1....1..0..1..1....0..0..1..0

..0..1..1..1....1..1..0..1....1..1..1..1....1..1..1..0....1..1..0..1

..1..0..1..1....1..1..0..1....1..0..0..0....1..1..1..1....0..0..0..0

CROSSREFS

Sequence in context: A250624 A231767 A278277 * A161649 A162150 A162388

Adjacent sequences:  A188302 A188303 A188304 * A188306 A188307 A188308

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2011

STATUS

approved

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Last modified May 16 17:38 EDT 2022. Contains 353719 sequences. (Running on oeis4.)