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A181265
Number of n X n binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order
0
2, 2, 6, 111, 2607, 256746, 63961223, 49499166213
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OFFSET
1,1
COMMENTS
Diagonal of
A181266
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
M and M*Mtranspose (mod 2) for 4X4
..0..1..1..0......0..0..1..1
..1..0..0..0......0..1..1..1
..1..0..1..0......1..1..0..0
..1..0..1..1......1..1..0..1
CROSSREFS
Sequence in context:
A303225
A326943
A304564
*
A093909
A114362
A007338
Adjacent sequences:
A181262
A181263
A181264
*
A181266
A181267
A181268
KEYWORD
nonn
AUTHOR
R. H. Hardin
Oct 10 2010
STATUS
approved
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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)