A181001 Number of (n+2)Xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an odd number of 1s

0, 0, 0, 2, 127, 16610, 5724089, 5560851506, 15994688084064, 141829598147941814

Offset

1,4

Comments

Subdiagonal 2 of A181000

Links

Table of n, a(n) for n=1..10.

Example

All solutions for 6X4
..0..0..0..1....0..0..0..1
..0..0..1..0....0..0..1..0
..0..1..0..0....0..1..1..1
..1..0..1..1....1..0..0..0
..1..1..0..1....1..1..0..1
..1..1..1..0....1..1..1..0

Crossrefs

Sequence in context: A125634 A075596 A092832 * A105761 A157473 A004864

Adjacent sequences: A180998 A180999 A181000 * A181002 A181003 A181004

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved