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A186833 Number of (n+2)X4 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 1
2688, 19904, 147428, 1075071, 6019798, 33731024, 188814612, 897952936, 4272342678, 20338694068, 87016169948, 372379475914, 1594343736734, 6342958109897, 25240403647650, 100475230637492, 379502308464848 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A186840
LINKS
EXAMPLE
Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..0..0....0..0..1..0....0..0..0..1....0..0..1..1....0..0..0..1
..0..0..0..1....0..1..0..1....0..0..1..1....0..0..1..0....0..0..0..1
..0..1..0..1....1..0..1..0....0..1..0..0....0..0..0..0....1..0..0..1
..0..1..1..1....0..1..1..0....0..1..0..0....1..1..0..1....0..1..1..0
..1..1..1..0....0..1..1..1....0..1..0..1....1..0..1..1....1..1..0..1
CROSSREFS
Sequence in context: A157613 A233899 A350184 * A229682 A186937 A185748
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 27 2011
STATUS
approved

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Last modified April 15 18:28 EDT 2024. Contains 371696 sequences. (Running on oeis4.)