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, 1, 199, 59805, 41985610, 78452652352, 425192615407453

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: A298251 A097732 A305413 * A155508 A028482 A111472

Adjacent sequences: A181004 A181005 A181006 * A181008 A181009 A181010

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved