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A186838 Number of (n+2)X9 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 0
6229504, 188814612, 5699887192, 156721188699, 2571152951156 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A186840

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 4X9

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

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

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

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

CROSSREFS

Sequence in context: A224640 A185887 A306872 * A204654 A138941 A251379

Adjacent sequences:  A186835 A186836 A186837 * A186839 A186840 A186841

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 2011

STATUS

approved

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Last modified November 18 19:59 EST 2019. Contains 329288 sequences. (Running on oeis4.)