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A185532 Number of (n+2) X 9 binary arrays with each 3 X 3 subblock nonsingular. 1
915702, 30631134, 989438596, 30654215226, 978050637454, 31056846439654, 981555541329694, 31129923319285058, 986788018195669218, 31261059190076491058, 990735792319754562254, 31398037364368755881486 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A185534.
LINKS
EXAMPLE
Some solutions for 4 X 9
..0..0..1..0..0..1..0..1..0....0..0..1..0..0..1..1..1..1
..0..1..0..1..1..0..1..1..0....0..1..1..0..1..0..1..0..0
..1..0..0..1..0..0..1..0..1....1..0..0..1..0..1..0..0..1
..0..0..1..1..1..1..0..1..0....0..0..1..0..0..1..1..1..0
CROSSREFS
Cf. A185534.
Sequence in context: A259012 A259005 A256903 * A360907 A321323 A156428
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2011
STATUS
approved

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Last modified April 20 02:14 EDT 2024. Contains 371798 sequences. (Running on oeis4.)