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A181007 Number of (n+3)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1s 0
0, 0, 0, 1, 199, 59805, 41985610, 78452652352, 425192615407453 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Subdiagonal 3 of A181004

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

All solutions for 7X4

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

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

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

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

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

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

..1..1..1..1

CROSSREFS

Sequence in context: A153179 A209181 A097732 * A155508 A028482 A111472

Adjacent sequences:  A181004 A181005 A181006 * A181008 A181009 A181010

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 30 2010

STATUS

approved

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Last modified May 24 20:57 EDT 2013. Contains 225631 sequences.