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A187519 Number of (n+1)X(n+1) 0..4 arrays with the array of 2X2 subblock determinants antisymmetric and no off-diagonal 2X2 subblock determinant zero 0
113, 1590, 34776, 1655170, 144075566 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A187521
LINKS
EXAMPLE
Some solutions for 4X4
..0..3..1..1....1..1..1..2....0..3..1..2....1..1..3..1....2..2..3..2
..0..1..1..2....1..1..3..0....0..1..1..4....2..2..2..2....2..2..4..1
..2..1..1..0....3..1..3..2....2..1..1..2....0..2..2..1....2..1..2..2
..3..1..3..0....0..2..0..0....2..0..2..4....2..3..4..2....3..4..2..2
CROSSREFS
Sequence in context: A300921 A075030 A079098 * A301529 A008362 A262074
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2011
STATUS
approved

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)