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A181277
Number of nX(n+3) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order
0
16, 188, 6060, 507052, 115127924, 76961864884
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OFFSET
1,1
COMMENTS
Superdiagonal 3 of
A181274
LINKS
Table of n, a(n) for n=1..6.
EXAMPLE
M and M*Mtranspose (mod 2) for 3X6
..0..1..0..1..0..1......1..1..1
..0..1..1..0..1..0......1..1..0
..1..0..1..1..1..0......1..0..0
CROSSREFS
Sequence in context:
A240361
A016292
A231834
*
A181269
A004333
A016237
Adjacent sequences:
A181274
A181275
A181276
*
A181278
A181279
A181280
KEYWORD
nonn
AUTHOR
R. H. Hardin
Oct 10 2010
STATUS
approved
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Last modified July 21 00:33 EDT 2024. Contains 374461 sequences. (Running on oeis4.)