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A181275
Number of nX(n+1) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order
0
4, 11, 79, 1629, 87873, 15691171, 7892201343
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OFFSET
1,1
COMMENTS
Superdiagonal 1 of
A181274
LINKS
Table of n, a(n) for n=1..7.
EXAMPLE
M and M*Mtranspose (mod 2) for 3X4
..0..0..0..1......1..0..0
..0..1..0..0......0..1..1
..0..1..1..0......0..1..0
CROSSREFS
Sequence in context:
A032110
A054234
A213328
*
A000850
A004796
A320289
Adjacent sequences:
A181272
A181273
A181274
*
A181276
A181277
A181278
KEYWORD
nonn
AUTHOR
R. H. Hardin
Oct 10 2010
STATUS
approved
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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)