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A181005
Number of (n+1)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, 2, 61, 3686, 652374, 338047350, 527266113211, 2545622222227666
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OFFSET
1,4
COMMENTS
Subdiagonal 1 of
A181004
LINKS
Table of n, a(n) for n=1..10.
EXAMPLE
All solutions for 5X4
..0..0..0..0....0..0..0..0
..0..0..1..1....0..0..1..1
..0..1..0..1....0..1..0..1
..1..0..1..0....1..0..0..1
..1..1..0..0....1..1..1..1
CROSSREFS
Sequence in context:
A037065
A065589
A190681
*
A289644
A347606
A094478
Adjacent sequences:
A181002
A181003
A181004
*
A181006
A181007
A181008
KEYWORD
nonn
AUTHOR
R. H. Hardin
Sep 30 2010
STATUS
approved
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Last modified May 2 15:04 EDT 2024. Contains 372197 sequences. (Running on oeis4.)