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A183040 Number of 3 X 3 0..n arrays with positive determinant. 1
87, 6396, 106449, 862194, 4680741, 19121763, 64776942, 188565579, 490027068, 1160214360, 2549098734, 5247510432, 10247764287, 19091929404, 34162836240, 59000910075, 98778606894, 160758105174, 255224874669, 396052831464 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some positive determinant 3 X 3 0..1 matrices
..1..1..1....0..0..1....0..1..0....0..1..1....1..1..1....0..1..0....0..1..0
..0..1..1....1..1..0....0..1..1....0..0..1....0..1..0....0..1..1....1..1..1
..1..0..1....0..1..0....1..1..1....1..1..0....0..0..1....1..0..1....1..1..0
CROSSREFS
Sequence in context: A017803 A017750 A291130 * A072692 A287590 A133391
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2011
STATUS
approved

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Last modified June 21 07:48 EDT 2024. Contains 373541 sequences. (Running on oeis4.)