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A181276 Number of nX(n+2) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order 0
8, 48, 766, 28924, 3409059, 1126220822 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Superdiagonal 2 of A181274

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

M and M*Mtranspose (mod 2) for 3X5

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

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

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

CROSSREFS

Sequence in context: A108214 A249514 A279739 * A010568 A080493 A355434

Adjacent sequences:  A181273 A181274 A181275 * A181277 A181278 A181279

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 10 2010

STATUS

approved

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Last modified July 2 13:44 EDT 2022. Contains 355007 sequences. (Running on oeis4.)