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A181269
Number of n X (n+3) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order.
0
16, 188, 6236, 513260, 120854852, 79509209528
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OFFSET
1,1
COMMENTS
Superdiagonal 3 of
A181266
.
LINKS
Table of n, a(n) for n=1..6.
EXAMPLE
M and M*Mtranspose (mod 2) for 3 X 6
..0..0..0..1..0..1......0..0..1
..0..1..1..1..1..1......0..1..1
..1..0..1..0..1..1......1..1..0
CROSSREFS
Cf.
A181266
.
Sequence in context:
A016292
A231834
A181277
*
A004333
A016237
A036735
Adjacent sequences:
A181266
A181267
A181268
*
A181270
A181271
A181272
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Oct 10 2010
STATUS
approved
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Last modified August 22 14:42 EDT 2024. Contains 375369 sequences. (Running on oeis4.)