A186837 - OEIS

A186837

Number of (n+2)X8 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

1421952, 33731024, 798816802, 17494747887, 235234097572, 3176962520030

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

OFFSET

1,1

COMMENTS

Column 6 of A186840

LINKS

EXAMPLE

Some solutions for 4X8

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 2011

STATUS

approved