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A181268 Number of nX(n+2) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order 0
8, 44, 730, 32124, 3610319, 1225897310 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Superdiagonal 2 of A181266
LINKS
Table of n, a(n) for n=1..6.
EXAMPLE
M and M*Mtranspose (mod 2) for 3X5
..0..0..1..1..0......0..0..1
..1..0..0..0..0......0..1..1
..1..1..0..1..1......1..1..0
CROSSREFS
Sequence in context: A366338 A129553 A174643 * A361490 A075863 A118838
Adjacent sequences: A181265 A181266 A181267 * A181269 A181270 A181271
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved

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Last modified June 12 14:48 EDT 2024. Contains 373331 sequences. (Running on oeis4.)