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A185861 1/128 the number of (n+2)X6 binary arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace 1
694, 9604, 148747, 2306566, 35696805, 552341314, 8546141676, 132241750157, 2046201477768, 31662104131197, 489920627750375, 7580791076767043, 117301071441252352, 1815056316879910619, 28085224933208554527 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A185866

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=13*a(n-1)+86*a(n-2)-729*a(n-3)-588*a(n-4)+7148*a(n-5)-4926*a(n-6)-832*a(n-7)-7418*a(n-8)+5675*a(n-9)-4618*a(n-10)+5644*a(n-11)-1871*a(n-12)+4193*a(n-13)-1693*a(n-14)+70*a(n-15)-954*a(n-16)-206*a(n-17)+152*a(n-18)+28*a(n-19) for n>21

EXAMPLE

Some solutions for 4X6

..0..1..0..0..1..1....0..1..0..1..0..0....0..1..1..1..1..1....0..1..1..0..0..0

..0..1..0..0..1..1....0..0..0..1..1..1....0..0..0..0..1..0....0..1..1..0..1..1

..0..0..1..0..0..0....0..1..0..1..0..1....0..1..0..1..0..1....0..0..0..1..0..1

..1..0..1..0..1..0....0..0..0..0..1..0....1..0..0..0..1..1....0..0..0..0..0..1

CROSSREFS

Sequence in context: A020385 A004242 A177215 * A115493 A214165 A048925

Adjacent sequences:  A185858 A185859 A185860 * A185862 A185863 A185864

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 05 2011

STATUS

approved

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Last modified October 18 19:31 EDT 2021. Contains 348069 sequences. (Running on oeis4.)