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A181014
Number of nX(n+3) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0
0
0, 0, 0, 0, 0, 1, 144, 10251, 1452733, 403935677, 256514525924, 404979395412269
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OFFSET
1,7
COMMENTS
Superdiagonal 3 of
A181011
LINKS
Table of n, a(n) for n=1..12.
EXAMPLE
All solutions for 6X9
..0..1..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1..1
..1..0..1..0..0..0..0..1..1
..1..0..1..0..0..1..1..0..0
..1..0..1..0..1..0..1..0..1
CROSSREFS
Sequence in context:
A299858
A308285
A008662
*
A035821
A231854
A055352
Adjacent sequences:
A181011
A181012
A181013
*
A181015
A181016
A181017
KEYWORD
nonn
AUTHOR
R. H. Hardin
Sep 30 2010
STATUS
approved
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Last modified May 11 00:12 EDT 2024. Contains 372388 sequences. (Running on oeis4.)