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A183687 Number of (n+1)X9 binary arrays with every 2X2 subblock nonsingular 1
768, 8912, 91136, 986128, 10382976, 110871040, 1174759296, 12503757968, 132720731392, 1411193901024, 14988337604480, 159306506171280, 1692418292451712, 17985312835495360, 191090003735667584 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 8 of A183688
LINKS
FORMULA
Empirical: a(n)=7*a(n-1)+162*a(n-2)-935*a(n-3)-10301*a(n-4)+50843*a(n-5)+343104*a(n-6)-1473463*a(n-7)-6611678*a(n-8)+24960936*a(n-9)+75737800*a(n-10)-253751744*a(n-11)-503746592*a(n-12)+1513486656*a(n-13)+1775133568*a(n-14)-4833383936*a(n-15)-2525235200*a(n-16)+6285426688*a(n-17)
EXAMPLE
Some solutions for 3X9
..0..1..1..0..1..1..0..1..0....0..1..1..1..0..1..0..1..0
..1..1..0..1..0..1..1..0..1....1..1..0..1..1..0..1..0..1
..0..1..1..1..1..1..0..1..0....0..1..1..1..0..1..1..1..0
CROSSREFS
Sequence in context: A219317 A281238 A268808 * A269051 A282287 A268627
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2011
STATUS
approved

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Last modified March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)