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A186934 Number of (n+1) X 5 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces. 1
144, 1664, 10496, 59720, 400192, 2504264, 16124472, 102475864, 654285152, 4168475512, 26600834384, 169634278408, 1082068348632, 6900437984584, 44011928616896, 280696997413664, 1790295379221024, 11418170020374768 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A186939.
LINKS
EXAMPLE
Some solutions for 4 X 5
..1..1..0..1..0....1..1..0..0..1....1..1..1..1..0....0..0..0..0..0
..1..0..0..1..0....1..0..0..0..1....1..0..0..0..0....1..1..1..0..0
..0..0..0..0..0....1..1..1..0..1....1..1..0..0..1....1..1..1..1..1
..1..0..0..1..1....1..1..0..0..1....0..1..1..0..1....0..0..0..1..0
CROSSREFS
Cf. A186939.
Sequence in context: A209205 A223594 A223445 * A356731 A368508 A066445
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2011
STATUS
approved

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Last modified February 25 06:37 EST 2024. Contains 370310 sequences. (Running on oeis4.)